8 bar domestic water pressure

[Jonny]

Hi
I measured my water pressure with a new water pressure test gauge, and got a reading of 8 bar. This was measured after the stopcock, at a dishwasher machine valve. I've looked at normal water pressures in the uk, and it seems that 8 bar is unusually high. This 8 bar pressure is found in the kitchen and one bathroom, but the rest of the house has 3 bar pressure, as the cold water for the rest of the house is fed after a 3 bar PRV which is installed because of a hot water tank.

Should the pressure be reduced to a normal pressure around 4 bar, by fitting a pressure regulator after the stopcock?

I'm worried that the 8 bar pressure is too much for some taps and the shower in a bathroom, and also I'm installing a new kitchen tap, and have found it difficult to find any rated at 8 bar.
Thanks for any replies

 

[ShaunCorbs]

Can you put your test dial back on and open the cold kitchen tap what pressure do you have now ?

 

[Jonny]

Can you put your test dial back on and open the cold kitchen tap what pressure do you have now ?

I'm afraid the kitchen tap has been removed and the pipes capped off, as it was leaking out of the bottom, and there were no isolation valves.

 

[rpm]

I`ve seen 6bar static pressure drop to 0.6bar dynamic pressure in a house which Shaun is getting at by asking you to open the tap.

 

[Jonny]

I`ve seen 6bar static pressure drop to 0.6bar dynamic pressure in a house which Shaun is getting at by asking you to open the tap.

I can try that with the bathroom tap once the dishwasher cycle has finished

 

[Jonny]

Turning two taps on in the bathroom changed the water pressure from 8bars to about 7.8 bars, so not much change at all

 

[SimonG]

High but not unheard of. Area round our way with 12.5 bar standing.

Just need to be careful that taps, showers etc are rated for your water pressure. Some will only go to 5 bar, some 10 bar.

 

[SimonG]

Have kitchen tap and outside tap off incoming mains then fit pressure reducing valve.

 

[Jonny]

Have you got a link to an appropriate PRV that could be used on 22mm copper pipe?

 

[ShaunCorbs]

Altecnic - 22mm Compression - Prescal Series 535 Dial Up Pressure Reducing Valve - 535022

Altecnic - Bottom Connection - 0-10 Bar 1/4" 50mm Dial Diameter Pressure Gauge - WI-557310

 

[Jonny]

Thanks for the link, looks like a suitable product.

 

[marvoni]

For years we had a constant 11 bar static pressure where I am up until recently. The only problems it caused was with toilet float valves overfilling, I used to replace those rubber seats every 6 months or so.

 

[Welder]

Put full bore iso vales on either side of the PRV on the incoming main and remember that the filter on the PRV will need cleaning religiously (not every sunday!) annually. You can then remove the other one.
Most tap cartridges of the single lever type are tested only to 4/5 bar so leak like a sieve when installed correctly. You will find many others either fail quickly or are difficult to use at 4 bar and above.