Pressure reducing valve for incoming mains

Taconite5 · Sunday at 4:33 PM

Hi, I'm thinking of putting a pressure reducing valve on my incoming mains mainly because it's spiking to over 6-7bar when taps are closed.

I need one that fits onto 22mm, but I noticed a few aren't full bore and restrict the flow quite a lot too. Now I know all reducing valves reduce flow and that's how they work but has anyone got any recommendations for mains flow?

Wayners · Sunday at 7:32 PM

Have you contacted the water company?
My local company asks people to report high pressure as I believe if it's on many houses or high enough to cause damage they will do something about it.

Taconite5 · Sunday at 7:58 PM

Yeah it’s 4bar. The spikes are causes by closing taps. Already got a hammer arrestor installed and it’s doing nothing.

Wayners · Sunday at 8:19 PM

I'm not convinced pressure reducing valve will work. I suppose it's worth a punt.
I see one at Screwfix (4671J)

Taconite5 · Sunday at 8:28 PM

Yeah seen that one! Why’s it so expensive?

denso13 · Sunday at 9:36 PM

These are pretty decent, https://www.bes.co.uk/adjustable-pressure-reducing-valve-15-22mm-22301/

I generally fit them as standard on new installs

Wayners · Monday at 7:09 AM

£18 on Amazon for a cheap one.
Think I'd stick with the branded.

https://amzn.eu/d/0gpKJQxv

I think some state 15mm as they come with a reducer. So will fit 22mm and 15mm.
You need to study the advert as not always clear it seems

Madrab · Monday at 10:24 AM

I'd pay the money for a good quality PRV - the cheap ones always seem to cause problems. That and ensure it is drop tight, don't want creep if the standing pressure can reach over 6 bar.

Reliance or Arrow would be my choice.

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Pressure reducing valve for incoming mains

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