Mains Water Pressure Advice

[dsbhachu1]

Hi all,

My house is about 28 years old so some things are starting to fail with age. I changed the main water stopcock and well as the PRV as the stopcock was leaking and the pressure valve would not budge from 4 bar (even when it was disconnected).

My main question is - what is the upper limit of acceptable pressure ? At the moment when everything is turned off the pressure is sitting at 4 bar, this drops to 3 bar when the the shower is turned on. The shower pressure upstairs could be better but could happily leave it like this also. Is it safe to crank the resting pressure up to 5 bar ? The heating system is a new boiler (2 years old) with an unvented system. There appears to be a PRV also by the "megaflo" tank.

Thank you in advance.

 

[ShaunCorbs]

Tbh no you should have the prv set to the same as the unvented prv around 3-3.5 bar as it’s all balanced then

 

[dsbhachu1]

Tbh no you should have the prv set to the same as the unvented prv around 3-3.5 bar as it’s all balanced then

Ah that's great thank you. Would that be 3-3.5 resting or running ?

Thanks

 

[ShaunCorbs]

Running ideally

 

[dsbhachu1]

Running ideally

Awesome cheers.