Pressure Reducing Valves FAQ – Pipetech Supplies

Below you'll find answers to the most common questions we receive about our pressure reducing valves (PRVs). If you need further technical guidance or help selecting the right valve for your application, our team is ready to assist.

What is a pressure reducing valve and how does it work?

A pressure reducing valve (PRV) automatically reduces a higher upstream pressure to a stable, lower downstream pressure. It uses a spring-loaded diaphragm or piston mechanism that adjusts the valve opening in response to changes in flow demand, maintaining a consistent outlet pressure regardless of fluctuations on the supply side.

What types of pressure reducing valves does Pipetech Supplies stock?

We carry a range of PRVs suited to domestic, commercial, and industrial applications. Our collection includes direct-acting and pilot-operated models in various body materials and connection types. Specific product details, pressure ratings, and technical datasheets are listed on each product page within the collection.

How do I choose the correct size pressure reducing valve for my system?

Sizing depends on the required flow rate, inlet pressure, desired outlet pressure, and the pipe diameter of your installation. Undersizing a PRV can cause excessive pressure drop and noise, while oversizing can lead to poor regulation. If you're unsure, contact our team with your system parameters and we can recommend a suitable model.

Are your pressure reducing valves suitable for potable water systems?

Several of the PRVs in our range hold WRAS (Water Regulations Advisory Scheme) approval, making them suitable for use in potable water installations in the UK. Check the individual product listing for WRAS certification details before specifying a valve for drinking water applications.

What pressure ratings are available across your PRV range?

Our pressure reducing valves are available in a variety of pressure ratings to suit different system requirements. Many models conform to recognised engineering standards such as PN16 or PN25. Each product page specifies the maximum inlet pressure and the adjustable outlet pressure range so you can match the valve to your installation.

Can I use a pressure reducing valve on a heating or steam system?

Certain PRVs in our collection are designed for use with hot water, steam, or other non-potable media. Material compatibility, temperature limits, and pressure class all need to be verified against your system conditions. Always refer to the product datasheet or speak with our technical team before installing a PRV in a heating or steam application.

How do I set the outlet pressure on a pressure reducing valve?

Most PRVs feature an adjustable spring mechanism, typically accessed via a handwheel or an adjusting screw on top of the valve body. Turning the adjuster clockwise usually increases the set pressure, while turning it anti-clockwise reduces it. A downstream pressure gauge should be fitted so you can verify the outlet pressure during commissioning.

Do pressure reducing valves require regular maintenance?

PRVs are generally low-maintenance, but periodic inspection is recommended to ensure reliable operation. Over time, diaphragms, seals, and seats can wear, leading to creep (gradual rise in downstream pressure) or leakage. We advise checking valve performance at least annually and replacing internal components according to the manufacturer's service schedule.

Do you offer next-day delivery on pressure reducing valves?

Next-day delivery is available on most stock items when you order before the cut-off time. Availability is shown on each product page. If you have an urgent requirement or need a bulk quantity, get in touch with us directly so we can confirm stock and arrange the fastest possible dispatch.

What should I do if my pressure reducing valve is not maintaining the set pressure?

If downstream pressure is creeping above the set point, the valve seat or diaphragm may be worn or contaminated with debris. First, check that the inlet strainer (if fitted) is clean and that no isolation valves upstream are partially closed. If the problem persists after basic checks, the valve internals may need servicing or replacement. Our team can help you identify the correct spare parts or a suitable replacement unit.