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Install a Pressure Reducing Valve (PRV) — Inspect and Adjust or Replace the Pressure Reducing Valve (PRV)

Beginner3 hours

Part of project

How to Increase Water Pressure in Your House · Step 2 of 3

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In this video

As a last resort, if your mains water pressure is extremely high (e.g., 5 or 6 bar) and other methods haven't worked, you may need to install a Water Pressure Reducing Valve (PRV). This device is plumbed into your main water line, usually after the stopcock, and allows you to manually set the downstream pressure to a desired level, typically around 3 bar. This requires cutting the main pipe and fitting the valve, which is a more advanced plumbing task.

Goal: Install a PRV to permanently control high water pressure.

  • This is an advanced job that involves cutting your main water pipe. Proceed with caution or hire a professional.

Used in this video

  • Pipe Cutter (Cutter Type: Pipe cutter) — Cutting the main water pipe to install the valve.
  • Pipe Wrenches (Tool Type: Pipe wrench) — Tightening the compression fittings on the PRV.
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FAQs

What specific tools, beyond a multi-screwdriver and pliers, might I need for this water pressure project?

You might also need an adjustable wrench for the PRV or stubborn aerators, and a bucket to catch any water during disassembly. Having a small brush or a de-scaling agent can be very helpful for thoroughly cleaning mineral deposits from aerators.

Are there any crucial safety precautions I should take before starting to work on my home's water pressure?

Always shut off the main water supply to your house before attempting to adjust or replace the PRV or clean aerators. This prevents accidental flooding or leaks. Also, wear gloves to protect your hands from grime and potential sharp edges.

How much should I expect to spend if I need to replace parts like a Pressure Reducing Valve or multiple aerators?

A new Pressure Reducing Valve (PRV) can cost $50 to $200 for the part itself, depending on the model and features. Individual faucet or showerhead aerators are much more affordable, typically ranging from $5 to $15 each. Factor these potential costs if simple cleaning or adjustments don't resolve the issue.

I've checked the main water valve and cleaned my aerators, but my water pressure is still low. What should I troubleshoot next?

If the main valve is fully open and aerators are clean, the Pressure Reducing Valve (PRV) is the next most likely culprit. Locate the PRV and try adjusting its screw clockwise to increase pressure. If adjustment doesn't help, or if the valve appears damaged, it likely needs replacement.

Transcript
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okay? Just follow my video and it's on YouTube. Okay, and last thing, if at the end of the world you just can't seem to cure it, the pressure is still too great. And I've come across this one. You could fit a pressure reducing valve. Now I'm going to take you through the back. I'm just going to show you what one is a light because I've knocked one at one ebay just to show you what they're like. So you know what they are. And there's one there. And as you can see, it's got a little valve on there. And this valve gives you the bar of pressure that you can reduce this down to. Okay, so you can bring it down to normally mains. Pressures is free bar, two bar, somewhere between two and three bar. If you've got all the pressures up somewhere about five or six, it's always going to make up banging. And you never get quite going to cure it. So this is your answer. Now, look, they're not too bad. A 17 pound 20 ony. But I've seen them cheaper again still. So I have a look around. And if it comes at worst, just cut your water mains under the sink. Above your stopcock and stick this thing in and cut the pressure down. And again, we'll cure all your problems for not a lot of money, not for a hassle you get in water pressure, you know, problems. So, okay, that I think about covers it all. So not too bad a problem. If you've got any more problems

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