Potterton promax system 24 he plus expansion vessel. Can I recharge?

[ashy]

Hello,

My boiler has started to lose pressure. I placed a bag over the pressure release valve drain and then pressurised system to 2 bar with the heating off. It remained steady and didn't lose pressure. I then switched the heating on and watched the pressure. It gradually increased to 3 bar and leaked into the bag over the valve drain. When the heating went off the pressure then dropped right down. I'm not a plumber put quite handy and suspect the expansion vessel. I can't see any leaks on it. It's an Cimm rp250 8L tank. Can I recharge it with a car style pump or is it knackered?

Cheers,

Dave

 

[leaky]

on cold fill up you should put in 1 bar pressure 1.5 at most so let some pressure out system till you are around that mark and try again

 

[ashy]

Thanks,

Released some of the pressure and tried at 1.25 bar with the same result. The pressure gradually rose as the water in the system heated to 3 bar and leaked into bag.[

Cheers,

Dave

QUOTE=leaky;440994]on cold fill up you should put in 1 bar pressure 1.5 at most so let some pressure out system till you are around that mark and try again[/QUOTE]

 

[fubar1000]

Pumping the E/V up is 9-10 times only a quick fix. Would be a lot better to replace it TBH

 

[ashy]

I'll recharge once and if it goes again then get it replaced. Thanks for help.

Dave