{"id":731,"date":"2026-07-10T15:34:12","date_gmt":"2026-07-10T13:34:12","guid":{"rendered":"https:\/\/www.valfonta.com\/blog\/water-pressure-reducing-valve\/"},"modified":"2026-10-22T09:20:04","modified_gmt":"2026-10-22T07:20:04","slug":"water-pressure-reducing-valve","status":"publish","type":"post","link":"https:\/\/www.valfonta.com\/en\/blog\/water-pressure-reducing-valve\/","title":{"rendered":"Water pressure reducing valve: what it is, how it works, and how to choose one"},"content":{"rendered":"<div class=\"wp-block-group vf-raiz vf-pl-articulo is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group vf-cat-wrap is-layout-flow wp-block-group-is-layout-flow\"><article class=\"wp-block-group vf-pdp vf-post is-layout-flow wp-block-group-is-layout-flow\"><nav class=\"wp-block-group vf-breadcrumbs vfa-aria-label--Breadcrumbs is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><a href=\"\/en\/\">Home<\/a><span class=\"vf-sep\">\u203a<\/span><a href=\"https:\/\/www.valfonta.com\/en\/blog\/\">Blog<\/a><span class=\"vf-sep\">\u203a<\/span><span aria-current=\"page\">Water pressure reducing valve: what it is, how it works, and how to choose one<\/span><\/p><\/nav><header class=\"wp-block-group vf-post-head is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-pdp-eyebrow wp-block-paragraph\"><a href=\"https:\/\/www.valfonta.com\/en\/pressure-reducing-valves\/\">Pressure reducing valves<\/a><\/p><h1 class=\"wp-block-heading\">Water pressure reducing valve: what it is, how it works, and how to choose one<\/h1><p class=\"vf-post-meta wp-block-paragraph\"><span>By Valfonta<\/span><span><time datetime=\"2026-09-29\">Updated September 29, 2026<\/time><\/span><span>9 min read<\/span><\/p><\/header><figure class=\"wp-block-image size-full vf-post-hero is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/valvula-reductora-de-presion-prv30.webp\" alt=\"Water pressure reducing valve: what it is, how it works, and how to choose one\" class=\"wp-image-170\" width=\"1200\" height=\"514\"\/><\/figure><div class=\"wp-block-group vf-post-grid is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group vf-post-body is-layout-flow wp-block-group-is-layout-flow\"><aside class=\"wp-block-group vf-post-summary vfa-aria-label--In%20summary is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-t wp-block-paragraph\">In summary<\/p><p class=\"wp-block-paragraph\">A water pressure reducing valve lowers the mains pressure and holds it steady at a safe value, protecting the installation against leaks, noise, and breakdowns. It works by balancing the water pressure against a spring, and it is installed after the water meter and the main shutoff valve. For domestic water, 2.5 to 3.5 bar is recommended, without exceeding about 5 bar. Valfonta offers the PRV30, a direct-acting valve self-compensated by piston, in AISI 316L stainless steel, with outlet pressures from 0.5 to 12 barg and inlet pressures up to 25 barg.<\/p><\/aside><details class=\"wp-block-details vf-post-toc-m is-layout-flow wp-block-details-is-layout-flow\"><summary>Article contents<\/summary><ol class=\"wp-block-list\"><li><a href=\"#que-es-una-valvula-reductora-de-presion-de-agua-y-para-que-s\">What a water pressure reducing valve is and what it is for<\/a><\/li><li><a href=\"#como-funciona-y-como-se-instala-una-valvula-reductora-de-pre\">How a water pressure reducing valve works and how it is installed<\/a><\/li><li><a href=\"#como-elegir-tu-valvula-reductora-de-presion-de-agua\">How to choose your water pressure reducing valve<\/a><\/li><li><a href=\"#preguntas\">Frequently asked questions<\/a><\/li><\/ol><\/details><p class=\"wp-block-paragraph\">The pressure of the public water mains is not always right for the installations it supplies. When it is too high or unstable, the result is leaks, noise, water hammer, and failures in faucets, water heaters, and industrial equipment. <\/p><p class=\"wp-block-paragraph\">The <strong>water pressure reducing valve is the component that solves this problem<\/strong>: it reduces the inlet pressure to a stable, safe value, regardless of fluctuations in the mains. In this guide, we explain what it is, how it works, how it is installed and adjusted, and which criteria to follow to choose the right model.<\/p><h2 class=\"wp-block-heading\" id=\"que-es-una-valvula-reductora-de-presion-de-agua-y-para-que-s\"><strong>What a water pressure reducing valve is and what it is for<\/strong><\/h2><p class=\"wp-block-paragraph\">A <strong>pressure reducing valve (PRV) is a mechanical device that lowers the pressure of a fluid as it passes through and keeps it constant downstream<\/strong>, at the value it has been set to. With water, it protects the entire installation downstream of it from excessive supply mains pressure.<\/p><h3 class=\"wp-block-heading\" id=\"definicion-y-funcion-principal\"><strong>Definition and main function<\/strong><\/h3><p class=\"wp-block-paragraph\">Its job is <strong>to turn a high, variable inlet pressure into a lower, stable outlet pressure.<\/strong> Unlike a simple stop valve, which only opens or closes, the reducing valve regulates automatically and continuously: it responds to changes in demand and mains pressure to hold the reference value. <\/p><p class=\"wp-block-paragraph\">So even if <strong>the inlet pressure rises at night<\/strong> or fluctuates throughout the day, the pressure delivered to faucets, appliances, and equipment <strong>stays within the desired range.<\/strong><\/p><h3 class=\"wp-block-heading\" id=\"por-que-es-necesaria-los-riesgos-de-la-presion-excesiva\"><strong>Why it is needed: the risks of excessive pressure<\/strong><\/h3><p class=\"wp-block-paragraph\">Excessive pressure speeds up wear across the entire installation and multiplies water use. Its most common consequences are:<\/p><div class=\"wp-block-group vf-t-ul is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group vf-t-li is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><i><\/i><\/p><p class=\"wp-block-paragraph\">Leaks and drips at gaskets, faucets, and fittings due to mechanical overstress.<\/p><\/div><div class=\"wp-block-group vf-t-li is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><i><\/i><\/p><p class=\"wp-block-paragraph\">Water hammer and pipe noise when demand is shut off abruptly.<\/p><\/div><div class=\"wp-block-group vf-t-li is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><i><\/i><\/p><p class=\"wp-block-paragraph\">Premature failure of water heaters, boilers, washing machines, and dishwashers, whose components are usually designed to operate below 3\u20134 bar.<\/p><\/div><div class=\"wp-block-group vf-t-li is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><i><\/i><\/p><p class=\"wp-block-paragraph\">Higher water and energy consumption, since the higher the pressure, the more flow is wasted with each use.<\/p><\/div><\/div><p class=\"wp-block-paragraph\">Reducing and stabilizing pressure extends the service life of the installation, improves comfort, and cuts maintenance costs.<\/p><h3 class=\"wp-block-heading\" id=\"principales-aplicaciones-del-uso-domestico-al-industrial\"><strong>Main applications, from domestic to industrial use<\/strong><\/h3><p class=\"wp-block-paragraph\">Water pressure reducing valves are used in a wide range of settings. In homes and residential buildings, they protect houses, apartment blocks, and buildings from the pressure of the service connection, especially on the lower floors of tall buildings, where the static head is greater. <\/p><p class=\"wp-block-paragraph\">In the commercial and service sector, they are installed in hotels, hospitals, sports centers, and office buildings, where stable pressure ensures comfort and the proper operation of equipment. <\/p><p class=\"wp-block-paragraph\">And in industry, they <strong>regulate process circuits, cooling systems, demineralized water lines, and applications that require special materials or oxygen service<\/strong>. In every case, the principle is the same: deliver a controlled, constant pressure to the point of use, regardless of variations in the mains.<\/p><h2 class=\"wp-block-heading\" id=\"como-funciona-y-como-se-instala-una-valvula-reductora-de-pre\"><strong>How a water pressure reducing valve works and how it is installed<\/strong><\/h2><p class=\"wp-block-paragraph\">Understanding the operating principle helps you install and adjust it correctly, and diagnose problems when they appear.<\/p><h3 class=\"wp-block-heading\" id=\"principio-de-funcionamiento-y-esquema\"><strong>Operating principle and diagram<\/strong><\/h3><p class=\"wp-block-paragraph\">Most <strong>direct-acting water reducing valves work by balancing the fluid pressure against the force of a spring.<\/strong> The inlet pressure reaches the valve, which closes because of the difference in areas. Compressing the spring with the adjusting screw makes the stem and seat assembly open the passage, allowing the outlet pressure to be regulated. <\/p><p class=\"wp-block-paragraph\"><strong>When the downstream pressure exceeds the set value<\/strong> (for example, when demand is shut off), <strong>the valve closes automatically;<\/strong> when there is demand again, it reopens. In piston self-compensated models, this design achieves a particularly stable outlet pressure even when the inlet pressure fluctuates. If you would like to learn more about how this component is represented in drawings and installations, see our guide to pressure reducing valve symbols.<\/p><p class=\"wp-block-paragraph\">It is worth distinguishing two main families. <strong>Direct-acting reducing valves,<\/strong> like the one described in this article, are simple, reliable, and economical, and ideal for most water installations. <strong>Pilot-operated reducing valves include a pilot valve that improves accuracy at high flows or large pressure drops<\/strong>, at the cost of greater complexity. For domestic, commercial, and much industrial use, a self-compensated direct-acting reducing valve more than meets the requirements.<\/p><h3 class=\"wp-block-heading\" id=\"donde-se-coloca-y-como-se-instala\"><strong>Where it goes and how it is installed<\/strong><\/h3><p class=\"wp-block-paragraph\">The reducing valve <strong>is installed on the water inlet pipe, after the water meter and the main shutoff valve, so that it protects the entire installation downstream.<\/strong> The adjusting screw should be left accessible and, whenever possible, a pressure gauge should be fitted downstream to check the outlet pressure. <\/p><p class=\"wp-block-paragraph\">As a general rule, it is advisable <strong>to install a shutoff valve before and after the reducing valve so maintenance can be done without draining the whole line<\/strong>. Many models, such as Valfonta\u2019s, can be mounted in different positions and allow access to the mechanism without dismantling the service line, which greatly simplifies installation and inspection.<\/p><h3 class=\"wp-block-heading\" id=\"como-regular-la-presion-de-salida\"><strong>How to adjust the outlet pressure<\/strong><\/h3><p class=\"wp-block-paragraph\">Adjustment is done <strong>with the valve in service and some demand open<\/strong>, using the adjusting screw: compressing the spring raises the outlet pressure, and loosening it lowers it. <\/p><p class=\"wp-block-paragraph\">The ideal value depends on the application, <strong>but in domestic water installations it is usually between 2.5 and 3.5 bar, without exceeding the 5 bar<\/strong> set by building regulations for the point of use. <\/p><p class=\"wp-block-paragraph\">After adjusting, check the reading on a pressure gauge and make sure the pressure stays stable both under demand and at rest. You can find more information in our articles on <a href=\"https:\/\/www.valfonta.com\/en\/blog\/how-it-regulate-a-pressure-reducing-valve\/\"><strong>how to adjust a pressure reducing valve<\/strong><\/a> and <a href=\"https:\/\/www.valfonta.com\/en\/blog\/where-the-pressure-reducing-valve-is-placed\/\"><strong>where to install a pressure reducing valve.<\/strong><\/a><\/p><h2 class=\"wp-block-heading\" id=\"como-elegir-tu-valvula-reductora-de-presion-de-agua\"><strong>How to choose your water pressure reducing valve<\/strong><\/h2><p class=\"wp-block-paragraph\">Not every reducing valve suits every installation. Choosing well means assessing the service conditions and the performance of the equipment.<\/p><h3 class=\"wp-block-heading\" id=\"criterios-tecnicos-de-seleccion\"><strong>Technical selection criteria<\/strong><\/h3><p class=\"wp-block-paragraph\">Before deciding on a model, be clear about the following parameters:<\/p><div class=\"wp-block-group vf-t-ul is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group vf-t-li is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><i><\/i><\/p><p class=\"wp-block-paragraph\">Maximum <strong>inlet pressure and desired outlet pressure<\/strong>, to confirm they fall within the valve\u2019s regulating range.<\/p><\/div><div class=\"wp-block-group vf-t-li is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><i><\/i><\/p><p class=\"wp-block-paragraph\"><strong>Required flow and Kv coefficient,<\/strong> which determine the size and prevent pressure drops or instability.<\/p><\/div><div class=\"wp-block-group vf-t-li is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><i><\/i><\/p><p class=\"wp-block-paragraph\"><strong>Size and connection type<\/strong> (threaded, flanged, BW\/SW welded, or clamp) to match the pipe.<\/p><\/div><div class=\"wp-block-group vf-t-li is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><i><\/i><\/p><p class=\"wp-block-paragraph\"><strong>Body and gasket materials,<\/strong> depending on the fluid, the temperature, and the sanitary or chemical requirements.<\/p><\/div><div class=\"wp-block-group vf-t-li is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><i><\/i><\/p><p class=\"wp-block-paragraph\">Special requirements: oxygen service, demineralized water, corrosive environments, or specific certifications.<\/p><\/div><\/div><p class=\"wp-block-paragraph\">When in doubt, the safest option is to get advice from a manufacturer who will study the system and propose the valve that best fits each need.<\/p><h3 class=\"wp-block-heading\" id=\"el-modelo-prv30-de-valfonta-y-opciones-bajo-demanda\"><strong>The Valfonta PRV30 and options on request<\/strong><\/h3><p class=\"wp-block-paragraph\">In addition, the PRV30 can be configured on request with additional features:<\/p><div class=\"wp-block-group vf-t-ul is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group vf-t-li is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><i><\/i><\/p><p class=\"wp-block-paragraph\">Kv reduced to 0.2 | 0.4 | 0.6 | 1 m\u00b3\/h.<\/p><\/div><div class=\"wp-block-group vf-t-li is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><i><\/i><\/p><p class=\"wp-block-paragraph\">Body and cover in bronze or Super Duplex.<\/p><\/div><div class=\"wp-block-group vf-t-li is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><i><\/i><\/p><p class=\"wp-block-paragraph\">BW or SW welded connection, and clamp connection.<\/p><\/div><div class=\"wp-block-group vf-t-li is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><i><\/i><\/p><p class=\"wp-block-paragraph\">Valve fully degreased for oxygen service.<\/p><\/div><div class=\"wp-block-group vf-t-li is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><i><\/i><\/p><p class=\"wp-block-paragraph\">Soft seals in EPDM, PEEK, Viton, Aflas, and other materials.<\/p><\/div><\/div><p class=\"wp-block-paragraph\">You can view the full product page for the <strong><a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-prv30\/\">PRV30 pressure reducing valve<\/a><\/strong> or see the whole range in the <strong><a href=\"https:\/\/www.valfonta.com\/en\/pressure-reducing-valves\/\">pressure reducing valves<\/a><\/strong> category.<\/p><div class=\"wp-block-group vf-tbl-wrap is-layout-flow wp-block-group-is-layout-flow\"><figure class=\"wp-block-table vf-post-table\"><table><tbody><tr><th>Feature<\/th><th>PRV30 specification<\/th><\/tr><tr><td>Type<\/td><td>Direct-acting, self-compensated by piston<\/td><\/tr><tr><td>Maximum allowable pressure<\/td><td>25 bar<\/td><\/tr><tr><td>Regulating pressure range<\/td><td>0.5 \u2013 12 bar<\/td><\/tr><tr><td>Body material<\/td><td>AISI 316 stainless steel<\/td><\/tr><tr><td>Advantages<\/td><td>Easy installation, low maintenance, mounting in several positions, and highly reliable regulation<\/td><\/tr><\/tbody><\/table><\/figure><\/div><p class=\"wp-block-paragraph\">You will find all models, with their pressure ranges and materials, on our <a href=\"https:\/\/www.valfonta.com\/en\/pressure-reducing-valves\/\">pressure reducing valves<\/a> page.<\/p><section id=\"preguntas\" class=\"wp-block-group vf-post-faq is-layout-flow wp-block-group-is-layout-flow\"><h2 class=\"wp-block-heading\">Frequently asked questions<\/h2><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>What should the water pressure be in a home?<\/summary><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">In domestic water installations, a working pressure of 2.5 to 3.5 bar is recommended. Building regulations require a minimum of approximately 1 bar at the points of use and set a maximum of around 5 bar; above that value, a reducing valve should be installed to protect the installation.<\/p><\/div><\/details><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Where is a water pressure reducing valve installed?<\/summary><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">It is installed on the inlet pipe, after the water meter and the main shutoff valve, so that it protects the entire installation downstream. It is advisable to leave the adjusting screw accessible, fit a pressure gauge downstream, and provide shutoff valves before and after to make maintenance easier.<\/p><\/div><\/details><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>How do I know if the pressure reducing valve is faulty?<\/summary><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">The most common signs are an outlet pressure that does not stay stable or that rises above the set value (especially with no demand), noise or vibration, or being unable to adjust it with the screw. If you see these symptoms, check the gaskets, spring, and seat. Our article on pressure reducing valve problems can help.<\/p><\/div><\/details><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>What is the difference between a reducing valve and a relief valve?<\/summary><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">A reducing valve continuously controls and limits the downstream pressure, keeping it stable at a working value. A relief valve is a safety device that only acts when the pressure exceeds a limit, discharging fluid to protect the system. One regulates; the other protects against occasional overpressure.<\/p><\/div><\/details><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>How often should the valve be inspected or serviced?<\/summary><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">It depends on the water quality and the service conditions, but an annual inspection is recommended to check the outlet pressure and the condition of the gaskets. With water that carries sediment or scale, and in demanding industrial applications, inspections should be more frequent. Easy-access models such as the PRV30 allow these inspections without dismantling the line.<\/p><\/div><\/details><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>What size do I need: \u00be, 1, 2...?<\/summary><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">The size is not chosen by pipe diameter alone, but by the flow and the allowable pressure drop. A \u00be\" reducing valve is common in domestic installations and small commercial lines, while higher flows require larger sizes. Ideally, it should be sized from the design flow; Valfonta\u2019s technical team can help you determine the right size.<\/p><\/div><\/details><\/section><\/div><aside class=\"wp-block-group vf-post-aside is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group vf-post-sticky is-layout-flow wp-block-group-is-layout-flow\"><nav class=\"wp-block-group vf-post-toc vfa-aria-label--Article%20contents is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">In this article<\/p><ol class=\"wp-block-list\"><li><a href=\"#que-es-una-valvula-reductora-de-presion-de-agua-y-para-que-s\">What a water pressure reducing valve is and what it is for<\/a><\/li><li><a href=\"#como-funciona-y-como-se-instala-una-valvula-reductora-de-pre\">How a water pressure reducing valve works and how it is installed<\/a><\/li><li><a href=\"#como-elegir-tu-valvula-reductora-de-presion-de-agua\">How to choose your water pressure reducing valve<\/a><\/li><li><a href=\"#preguntas\">Frequently asked questions<\/a><\/li><\/ol><\/nav><div class=\"wp-block-group vf-post-cta is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-t wp-block-paragraph\">Do you need a pressure reducing valve?<\/p><p class=\"wp-block-paragraph\">We help you choose the right model and size for your installation.<\/p><p class=\"vf-envolt wp-block-paragraph\"><a class=\"vf-btn vf-btn--pri\" href=\"#contactar\">Request a quote<\/a><\/p><p class=\"vf-envolt wp-block-paragraph\"><a class=\"vf-btn vf-btn--sec\" href=\"https:\/\/www.valfonta.com\/en\/pressure-reducing-valves\/\">View pressure reducing valves<\/a><\/p><p class=\"vf-tel wp-block-paragraph\">Or call <a href=\"tel:+34933720888\">933 720 888<\/a><\/p><\/div><\/div><\/aside><\/div><section id=\"valvulas\" class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><h2 class=\"wp-block-heading\">Related valves<\/h2><ul class=\"vf-rel wp-block-list\"><li><a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-prv30\/\"><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/valvula-reductora-presion-prv30-frontal-400.webp\" alt=\"PRV30 reducing valve\" class=\"wp-image-199\" width=\"300\" height=\"300\" loading=\"lazy\"><b>PRV30 reducing valve<\/b><span>316L stainless, from DN15 to DN25, threaded or flanged, up to 25 bar.<\/span><\/a><\/li><li><a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valves-m1\/\"><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/valvula-reductora-presion-m1-perspectiva-400.webp\" alt=\"M1 reducing valve\" class=\"wp-image-201\" width=\"300\" height=\"300\" loading=\"lazy\"><b>M1 reducing valve<\/b><span>Up to DN150 and 220 \u00b0C, for steam.<\/span><\/a><\/li><li><a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-vd\/\"><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/valvula-reductora-presion-vd-perspectiva-400.webp\" alt=\"VD reducing valve\" class=\"wp-image-10116\" width=\"300\" height=\"300\" loading=\"lazy\"><b>VD reducing valve<\/b><span>From DN15 to DN100, up to 40 bar, and steam up to 200 \u00b0C.<\/span><\/a><\/li><\/ul><p class=\"vf-post-more wp-block-paragraph\"><a href=\"https:\/\/www.valfonta.com\/en\/pressure-reducing-valves\/\">View all pressure reducing valves \u2192<\/a><\/p><\/section><section id=\"articulos\" class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><h2 class=\"wp-block-heading\">Related articles<\/h2><div class=\"wp-block-group vf-post-cards vf-t-ul is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group vf-t-li is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group vf-amb-enllac is-layout-flow wp-block-group-is-layout-flow\"><figure class=\"wp-block-image vf-img-suelta\"><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/como-instalar-una-valvula-reductora-de-presion-de-agua1.png.jpg\" alt=\"\" class=\"wp-image-242\" width=\"400\" height=\"225\" loading=\"lazy\"><\/figure><div class=\"wp-block-group vf-in is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><small>Pressure reducing valves<\/small><b>How do you install a water pressure reducing valve?<\/b><span>5 min read<\/span><\/p><\/div><p class=\"vf-enllac wp-block-paragraph\"><a class=\"vf-enllac-estirat\" href=\"https:\/\/www.valfonta.com\/en\/blog\/how-to-install-pressure-reducing-valve\/\" aria-label=\"Pressure reducing valves How do you install a water pressure reducing valve? 5 min read\"><\/a><\/p><\/div><\/div><div class=\"wp-block-group vf-t-li is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group vf-amb-enllac is-layout-flow wp-block-group-is-layout-flow\"><figure class=\"wp-block-image vf-img-suelta\"><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/como-regular-una-valvula-reductora-de-presion.webp\" alt=\"\" class=\"wp-image-226\" width=\"400\" height=\"225\" loading=\"lazy\"><\/figure><div class=\"wp-block-group vf-in is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><small>Pressure reducing valves<\/small><b>How do you adjust a pressure reducing valve?<\/b><span>9 min read<\/span><\/p><\/div><p class=\"vf-enllac wp-block-paragraph\"><a class=\"vf-enllac-estirat\" href=\"https:\/\/www.valfonta.com\/en\/blog\/how-it-regulate-a-pressure-reducing-valve\/\" aria-label=\"Pressure reducing valves How do you adjust a pressure reducing valve? 9 min read\"><\/a><\/p><\/div><\/div><div class=\"wp-block-group vf-t-li is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group vf-amb-enllac is-layout-flow wp-block-group-is-layout-flow\"><figure class=\"wp-block-image vf-img-suelta\"><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/valvula-reductora-que-es.webp\" alt=\"\" class=\"wp-image-247\" width=\"400\" height=\"225\" loading=\"lazy\"><\/figure><div class=\"wp-block-group vf-in is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><small>Pressure reducing valves<\/small><b>What is a steam pressure reducing valve?<\/b><span>14 min read<\/span><\/p><\/div><p class=\"vf-enllac wp-block-paragraph\"><a class=\"vf-enllac-estirat\" href=\"https:\/\/www.valfonta.com\/en\/blog\/pressure-reducing-valve-for-steam-valfonta\/\" aria-label=\"Pressure reducing valves What is a steam pressure reducing valve? 14 min read\"><\/a><\/p><\/div><\/div><\/div><\/section><section id=\"contactar\" class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group vf-quote is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><h2 class=\"wp-block-heading\">Can we help with your installation?<\/h2><p class=\"wp-block-paragraph\">Tell us the fluid, the inlet and outlet pressures, the temperature, and the flow rate, and we will recommend the right valve.<\/p><p class=\"vf-pdp-contact wp-block-paragraph\">You can also call <a href=\"tel:+34933720888\">933 720 888<\/a> or email <a href=\"mailto:valfonta@valfonta.com\">valfonta@valfonta.com<\/a>.<\/p><\/div>\n<div class=\"wpcf7 no-js\" id=\"wpcf7-f535-o1\" lang=\"en-US\" dir=\"ltr\" data-wpcf7-id=\"535\">\n<div class=\"screen-reader-response\"><p role=\"status\" aria-live=\"polite\" aria-atomic=\"true\"><\/p> <ul><\/ul><\/div>\n<form action=\"\/en\/wp-json\/wp\/v2\/posts\/731#wpcf7-f535-o1\" method=\"post\" class=\"wpcf7-form init vf-form wpcf7-acceptance-as-validation\" aria-label=\"Contact form\" novalidate=\"novalidate\" data-status=\"init\" toolname=\"consulta_contacto\" tooldescription=\"Send an enquiry to Valfonta, industrial valve manufacturer; a member of the team will reply.\">\n<fieldset class=\"hidden-fields-container\"><input type=\"hidden\" name=\"_wpcf7\" value=\"535\" \/><input type=\"hidden\" name=\"_wpcf7_version\" value=\"6.2.3\" \/><input type=\"hidden\" name=\"_wpcf7_locale\" value=\"en_US\" \/><input type=\"hidden\" name=\"_wpcf7_unit_tag\" value=\"wpcf7-f535-o1\" \/><input type=\"hidden\" name=\"_wpcf7_container_post\" value=\"0\" \/><input type=\"hidden\" name=\"_wpcf7_posted_data_hash\" value=\"\" \/><input type=\"hidden\" name=\"_vf_t\" value=\"1792702972.6f7c42f00b40e5d8\" \/>\n<\/fieldset>\n<label>Name *<span class=\"wpcf7-form-control-wrap\" data-name=\"nombre\"><input size=\"40\" maxlength=\"400\" class=\"wpcf7-form-control wpcf7-text wpcf7-validates-as-required\" autocomplete=\"name\" aria-required=\"true\" aria-invalid=\"false\" value=\"\" type=\"text\" name=\"nombre\" \/><\/span><\/label><label>Company<span class=\"wpcf7-form-control-wrap\" data-name=\"empresa\"><input size=\"40\" maxlength=\"400\" class=\"wpcf7-form-control wpcf7-text\" autocomplete=\"organization\" aria-invalid=\"false\" value=\"\" type=\"text\" name=\"empresa\" \/><\/span><\/label><label>Email *<span class=\"wpcf7-form-control-wrap\" data-name=\"email\"><input size=\"40\" maxlength=\"400\" class=\"wpcf7-form-control wpcf7-email wpcf7-validates-as-required wpcf7-text wpcf7-validates-as-email\" autocomplete=\"email\" aria-required=\"true\" aria-invalid=\"false\" value=\"\" type=\"email\" name=\"email\" \/><\/span><\/label><label>Phone<span class=\"wpcf7-form-control-wrap\" data-name=\"telefono\"><input size=\"40\" maxlength=\"400\" class=\"wpcf7-form-control wpcf7-tel wpcf7-text wpcf7-validates-as-tel\" autocomplete=\"tel\" aria-invalid=\"false\" value=\"\" type=\"tel\" name=\"telefono\" \/><\/span><\/label><label class=\"vf-full\">Reason for your inquiry<span class=\"wpcf7-form-control-wrap\" data-name=\"motivo\"><select class=\"wpcf7-form-control wpcf7-select\" aria-invalid=\"false\" name=\"motivo\"><option value=\"\">Select<\/option><option value=\"Request a quote\">Request a quote<\/option><option value=\"Technical advice on choosing a valve\">Technical advice on choosing a valve<\/option><option value=\"Spare parts or repair\">Spare parts or repair<\/option><option value=\"Documentation or certificates\">Documentation or certificates<\/option><option value=\"Other\">Other<\/option><\/select><\/span><\/label><label class=\"vf-full\">Message *<span class=\"wpcf7-form-control-wrap\" data-name=\"mensaje\"><textarea cols=\"40\" rows=\"5\" maxlength=\"2000\" class=\"wpcf7-form-control wpcf7-textarea wpcf7-validates-as-required\" aria-required=\"true\" aria-invalid=\"false\" placeholder=\"Tell us what you need: fluid, pressures, flow rate, model, or serial number\u2026\" name=\"mensaje\"><\/textarea><\/span><\/label><label class=\"vf-chk vf-full\"><span class=\"wpcf7-form-control-wrap\" data-name=\"privacidad\"><span class=\"wpcf7-form-control wpcf7-acceptance\"><span class=\"wpcf7-list-item\"><input type=\"checkbox\" name=\"privacidad\" value=\"1\" aria-invalid=\"false\" \/><\/span><\/span><\/span> <span>I have read and accept the <a href=\"\/en\/privacy-policy\/\">privacy policy<\/a> *<\/span><\/label><input class=\"wpcf7-form-control wpcf7-submit has-spinner vf-btn vf-btn--pri\" type=\"submit\" value=\"Send message\" \/><span class=\"vf-hp\" aria-hidden=\"true\"><label>Web <input type=\"text\" name=\"vf_web\" value=\"\" tabindex=\"-1\" autocomplete=\"off\" toolparamdescription=\"Campo de control: d\u00e9jalo vac\u00edo\"><\/label><\/span><div class=\"wpcf7-response-output\" aria-hidden=\"true\"><\/div>\n<\/form>\n<\/div>\n\n<\/div><\/section><div class=\"wp-block-group vf-pdp-bar is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><a class=\"vf-btn vf-btn--sec\" href=\"tel:+34933720888\">Call<\/a><a class=\"vf-btn vf-btn--pri\" href=\"#contactar\">Request a quote<\/a><\/p><\/div><\/article><\/div><\/div>","protected":false},"excerpt":{"rendered":"<p>A water pressure reducing valve reduces the supply pressure and keeps it stable at a safe value, protecting the installation against leaks, noise, and failures.<\/p>\n","protected":false},"author":1,"featured_media":170,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_generate-full-width-content":"true","_generate-disable-headline":"true","rank_math_title":"Water pressure reducing valve: guide | Valfonta","rank_math_description":"What a water pressure reducing valve is, how it works, how to install and adjust it, and how to choose the right model (Valfonta PRV30).","rank_math_focus_keyword":"","vf_jsonld":"[{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Organization\",\"@id\":\"https:\/\/www.valfonta.com\/#organization\",\"name\":\"Valfonta\",\"legalName\":\"Val Fonta, S.L.\",\"taxID\":\"B59935718\",\"url\":\"https:\/\/www.valfonta.com\/en\/\",\"logo\":{\"@type\":\"ImageObject\",\"url\":\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/valfonta-logo.webp\"},\"foundingDate\":\"1962\",\"email\":\"valfonta@valfonta.com\",\"telephone\":\"+34 933 720 888\",\"address\":{\"@type\":\"PostalAddress\",\"streetAddress\":\"C\/ Bronze 26, Pol. Ind. Les Guixeres\",\"postalCode\":\"08915\",\"addressLocality\":\"Badalona\",\"addressRegion\":\"Barcelona\",\"addressCountry\":\"ES\"},\"description\":\"Design, manufacture, and sale of pressure reducing valves, pressure relief valves, and control valves.\"},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.valfonta.com\/#website\",\"url\":\"https:\/\/www.valfonta.com\/en\/\",\"name\":\"Valfonta\",\"publisher\":{\"@id\":\"https:\/\/www.valfonta.com\/#organization\"},\"inLanguage\":\"en\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.valfonta.com\/en\/blog\/water-pressure-reducing-valve\/#webpage\",\"url\":\"https:\/\/www.valfonta.com\/en\/blog\/water-pressure-reducing-valve\/\",\"name\":\"Water pressure reducing valve: guide | Valfonta\",\"description\":\"What a water pressure reducing valve is, how it works, how to install and adjust it, and how to choose the right model (Valfonta PRV30).\",\"isPartOf\":{\"@id\":\"https:\/\/www.valfonta.com\/#website\"},\"about\":{\"@id\":\"https:\/\/www.valfonta.com\/#organization\"},\"inLanguage\":\"en\",\"datePublished\":\"2026-07-10T15:34:12+02:00\",\"dateModified\":\"2026-09-29T12:00:00+02:00\",\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/valvula-reductora-de-presion-prv30.webp\"},\"breadcrumb\":{\"@id\":\"https:\/\/www.valfonta.com\/en\/blog\/water-pressure-reducing-valve\/#breadcrumb\"}},{\"@type\":\"ImageObject\",\"@id\":\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/valvula-reductora-de-presion-prv30.webp\",\"url\":\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/valvula-reductora-de-presion-prv30.webp\",\"caption\":\"Water pressure reducing valve: what it is, how it works, and how to choose one\",\"inLanguage\":\"en\"},{\"@type\":\"ImageObject\",\"@id\":\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/valvula-reductora-de-presion-prv30.webp\",\"url\":\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/valvula-reductora-de-presion-prv30.webp\",\"width\":\"1000\",\"height\":\"1000\",\"caption\":\"prv30 pressure reducing valve\",\"inLanguage\":\"en\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.valfonta.com\/en\/blog\/water-pressure-reducing-valve\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/www.valfonta.com\/en\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Blog\",\"item\":\"https:\/\/www.valfonta.com\/en\/blog\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Water pressure reducing valve: what it is, how it works, and how to choose one\",\"item\":\"https:\/\/www.valfonta.com\/en\/blog\/water-pressure-reducing-valve\/\"}]},{\"@type\":\"BlogPosting\",\"keywords\":\"\u00be water pressure reducing valve\",\"articleSection\":\"Pressure reducing valves\",\"subjectOf\":[{\"@id\":\"https:\/\/www.valfonta.com\/en\/blog\/water-pressure-reducing-valve\/#faq\"}],\"@id\":\"https:\/\/www.valfonta.com\/en\/blog\/water-pressure-reducing-valve\/#schema-411699\",\"isPartOf\":{\"@id\":\"https:\/\/www.valfonta.com\/en\/blog\/water-pressure-reducing-valve\/#webpage\"},\"publisher\":{\"@id\":\"https:\/\/www.valfonta.com\/#organization\"},\"image\":{\"@id\":\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/valvula-reductora-de-presion-prv30.webp\"},\"inLanguage\":\"en\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.valfonta.com\/en\/blog\/water-pressure-reducing-valve\/#webpage\"},\"headline\":\"Water pressure reducing valve: what it is, how it works, and how to choose one\",\"name\":\"Water pressure reducing valve: guide | Valfonta\",\"description\":\"What a water pressure reducing valve is, how it works, how to install and adjust it, and how to choose the right model (Valfonta PRV30).\",\"author\":{\"@id\":\"https:\/\/www.valfonta.com\/#organization\"},\"dateModified\":\"2026-09-29T12:00:00+02:00\",\"abstract\":\"A water pressure reducing valve lowers the mains pressure and holds it steady at a safe value, protecting the installation against leaks, noise, and breakdowns. It works by balancing the water pressure against a spring, and it is installed after the water meter and the main shutoff valve. For domestic water, 2.5 to 3.5 bar is recommended, without exceeding about 5 bar. Valfonta offers the PRV30, a direct-acting valve self-compensated by piston, in AISI 316L stainless steel, with outlet pressures from 0.5 to 12 barg and inlet pressures up to 25 barg.\"},{\"@type\":\"FAQPage\",\"@id\":\"https:\/\/www.valfonta.com\/en\/blog\/water-pressure-reducing-valve\/#faq\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What should the water pressure be in a home?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"In domestic water installations, a working pressure of 2.5 to 3.5 bar is recommended. Building regulations require a minimum of approximately 1 bar at the points of use and set a maximum of around 5 bar; above that value, a reducing valve should be installed to protect the installation.\"}},{\"@type\":\"Question\",\"name\":\"Where is a water pressure reducing valve installed?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"It is installed on the inlet pipe, after the water meter and the main shutoff valve, so that it protects the entire installation downstream. It is advisable to leave the adjusting screw accessible, fit a pressure gauge downstream, and provide shutoff valves before and after to make maintenance easier.\"}},{\"@type\":\"Question\",\"name\":\"How do I know if the pressure reducing valve is faulty?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The most common signs are an outlet pressure that does not stay stable or that rises above the set value (especially with no demand), noise or vibration, or being unable to adjust it with the screw. If you see these symptoms, check the gaskets, spring, and seat. Our article on pressure reducing valve problems can help.\"}},{\"@type\":\"Question\",\"name\":\"What is the difference between a reducing valve and a relief valve?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"A reducing valve continuously controls and limits the downstream pressure, keeping it stable at a working value. A relief valve is a safety device that only acts when the pressure exceeds a limit, discharging fluid to protect the system. One regulates; the other protects against occasional overpressure.\"}},{\"@type\":\"Question\",\"name\":\"How often should the valve be inspected or serviced?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"It depends on the water quality and the service conditions, but an annual inspection is recommended to check the outlet pressure and the condition of the gaskets. With water that carries sediment or scale, and in demanding industrial applications, inspections should be more frequent. Easy-access models such as the PRV30 allow these inspections without dismantling the line.\"}},{\"@type\":\"Question\",\"name\":\"What size do I need: \u00be, 1, 2...?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The size is not chosen by pipe diameter alone, but by the flow and the allowable pressure drop. A \u00be\\\" reducing valve is common in domestic installations and small commercial lines, while higher flows require larger sizes. Ideally, it should be sized from the design flow; Valfonta\u2019s technical team can help you determine the right size.\"}}]}]}]","footnotes":"","_vg_translation_of":"498","_vg_lang":"en","_vg_wpml_state":"{\"lang\":\"en\",\"trid\":\"692\",\"src\":\"es\"}"},"categories":[36],"tags":[],"class_list":["post-731","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-pressure-reducing-valves"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/posts\/731","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/comments?post=731"}],"version-history":[{"count":2,"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/posts\/731\/revisions"}],"predecessor-version":[{"id":10207,"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/posts\/731\/revisions\/10207"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/media\/170"}],"wp:attachment":[{"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/media?parent=731"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/categories?post=731"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/tags?post=731"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}