New pressure reducing valve

[Fallout]

Anyone fit a new pressure reducing valve and the pressure just constantly rises

 

[Fallout]

It will lower the pressure when in use but after using an appliance then pressure dial just keeps rising. So can't set to 3 bar.

 

[Fallout]

That's the valve. Pressure just carries on rising to maximum

 

[Johntheo5]

Can you just get a very small flow from it and see what pressure does it then show. What pressure is set to. (looks like 3.0bar)

Also the Predator is NOT a drop tight PRV which means the pressure will rise to the full upstream pressure with no demand.

Drop Tight PRVs (there are probably more)

Caleffi 535

Reliance 312 Series

Honeywell D05

Honeywell D06

NON Drop Tight PRVs

Caleffi 533

Reliance Predator (PRED800015)

Honeywell D04

 

[Fallout]

Thanks so this pressure reducer don't protect the house from high mains pressure when no appliances are getting used? It will just let the pressure get to the pressure would be anyway without a pressure reducer fitted?

 

[Johntheo5]

Yes, that's correct, you must install the drop tight type to achieve no flow set point pressure.

 

[Fallout]

Thanks I've just looked online and it suggests the predator is of the drop tight kind. I've fit one before to protect a water heater from 7 bar pressure and it held at 3 bar.