Potterton Promax HE24

[allan.warics]

Hi I have got a loss of water pressure, I have replaced the PRV about 8 weeks ago as PRV was definitely letting by, but problem is now back, There are no signs of leaks. Is it the expansion vessel?

 

[diamondgas]

:welcome: to the forum Allan

Is your prv letting by again? What are you re-pressuiring the system too? Does the pressure rise quickly to 3bar when you turn your heating on? how long does it take for the pressure to drop? A few questions that, if you can answer, should hel us better help you

 

[allan.warics]

Prv does not appear to be letting by. I am repressurising to 1.25b and it takes about 10hrs to drop.
Pressure drops back when boiler 1st strickes up and then rises quickly. Thanks

 

[diamondgas]

pressure rising quickly is a good sign that the EV has lost its charge. Pressure loss is still loosing water but it may be a tiny amount to be honest. Get the EV re-charged then see how long it takes for the pressure to go down