If you already have a PRV installed, any of the above could be an indication that it is underperforming or failing, and perhaps overdue for maintenance or replacement. Blockages of the valve mechanism in a PRV can be caused by debris build-up over time, although most high-quality models will include a built-in stainless-steel mesh to help reduce this.

What is a pressure reducing valve? This guide is designed to provide a comprehensive answer to this question alongside covering the PRV basics. We will offer a simple explanation of how they work, their common applications and functions, and the benefits of using pressure reducing valves in home or industrial installations.

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How to adjust a water pressure reducing valve

By contrast, a pressure relief valve refers to a typically automated failsafe device. These are normally designed to offer a path of least resistance in case system pressure rises above a safe maximum, allowing a volume of water/steam to escape suddenly and directly to an outdoor runoff. For sealed plumbing systems, you might see them referred to as blow-off valves. This type of mechanism often needs to be checked and reset after venting.

Pressure reducing valves are commonly known as PRVs. They sometimes share this acronym with pressure relief or release valves, but it is important to differentiate between the two. For clarity, the latter are frequently labelled SRVs (safety release valves) or PSVs (pressure safety valves). In this guide, PRV means pressure reducing valve.

How to adjust pressure reducing valve on boiler

We will also cover some of the various PRV connection types available to buy online. By the end of the guide, you should be familiar with the correct definition of a pressure reducing valve, have a clear idea of what they do, and know how to shop for different models and connection fittings.

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This type of PRV connection is generally most associated with non-copper fittings, including brass, stainless steel, PVC, galvanised and screwed iron.

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All product warranties implied are the manufacturer's liability. If an item is returned under the manufacturer's warranty, Liberty Supply will forward the returned goods to the manufacturer for inspection and determination, which may take up to five (5) weeks. The final decision for warranty is solely at the manufacturer's discretion.

There are various types of pressure reducing valves and PRV connections available to buy online in the UK and elsewhere. Among the most common PRV types and connection standards are:

No restocking fee will be imposed on items authorized for return within 30 days if they are in the original, unopened packaging and not subject to a manufacturer-imposed restocking fee. Certain products are subject to a restocking fee. This fee is determined by the specific rules set by the product's manufacturer.

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There are several key benefits of using a pressure reducing valve in domestic, industrial or commercial water installations. These include:

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This Watts pressure reducing valve regulates water pressure in plumbing systems. It features a quick-connect design for easy installation and maintenance. The model includes both 3/4 inch connections, suitable for standard residential water lines.

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Pressure reducing valve location

A pressure reducing valve is used for lowering and regulating water or air pressure between the upstream (inlet) and downstream (outlet) sides. We will discuss their workings in more detail a little later. In summary though, for a typical water installation:

They work using an attached collar-style fastener that fits over various diameters of hard copper pipe, plastic, and soft tubing runs. The sleeve or ferrule of a compression fitting slides over the pipe, and then a nut is placed over this arrangement which helps to clamp down the fitting around the joint.

Items opened and returned prior to 90 days after the date of invoice are subject to an additional 20% re-stock fee as long as they are in unaltered, saleable condition. Previously used/installed items cannot be returned unless covered by warranty.

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Returns for special order items or items that have been modified (such as an impeller trim) are assessed on a case-by-case basis. If a return is allowed, special order items will incur a variable re-stock fee of up to 50%.

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A PRV BSP fitting is short for British Standard Pipe, a technical standard for screw threading on plumbing pipes and connections. It tends to demote a standard screw-fit male-to-female pipe fitting and a range of standard sizes for both pipe threading and pipe/fastener dimensions.

A pressure reducing valve is instead designed to work continually and incrementally, helping to keep outlet pressure always down to the required level. PRVs feature in many kinds of water installations, including domestic, workplace, industrial and commercial plumbing systems. PRVs are effectively multi-functional - by lowering outlet pressure and flow rate, they also help reduce excessive water consumption and plumbing noise.

Pressure reducing valves help to regulate these fluctuating mains pressures, keeping them down to an appropriate level during times when they might otherwise build too high. PRVs lower incoming water pressure to a consistent and manageable level via a spring-loaded piston and diaphragm arrangement.

Liberty Supply accepts returns up to 90 days after the date of invoice for domestic transactions. All returns must be issued an RMA number. RMA requests can be made by emailing support@libertysupply.com. International transactions are non-returnable and non-refundable.

Many types of buildings and water installations may benefit from using a PRV, particularly if the current system shows signs of excessively high pressure. In a typical plumbed water system, these may include:

PRVs work by converting high water pressure at the valve inlet nozzle to lower pressure at the outlet. In the UK, mains supply pressure can vary widely, from 1bar to 20bar or more. It may also fluctuate during periods of higher or lower usage in a given area.

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Customers can either ship authorized return items back to Liberty Supply or request a pick-up arranged by us. If Liberty Supply is not at fault, return shipping costs and any freight charges for replacement or original orders will be deducted from the credited amount.

PRV compression fittings are models designed with popular and easy-to-install compression-type joints. These are among the fastest and handiest ways to join ducting or supply pipes together with other components.

Similarly, the gradual degradation of components such as diaphragms and springs can lead to leakage through the valve in long-term use. This will greatly reduce the overall effectiveness of a pressure reduction valve, and so it is generally recommended to get them properly checked every couple of years in daily use.