Worcester Heatslave 20/25 pressure valve sticks

[richard3009]

Worcester Heatslave 20/25 pressure valve sticks open when manually releasing pressure, takes a lot of faffing around to get it to close, is it a replacement job

 

[TFGplumbing]

Yes replace it, but why are you having to manually release the pressure?

 

[richard3009]

Topped up on the loop and slightly over cooked it so was just easing back a gnats, and the bloody thing wouldn't close, lost 90% pressure

 

[TFGplumbing]

Topped up on the loop and slightly over cooked it so was just easing back a gnats, and the bloody thing wouldn't close, lost 90% pressure

Never use the prv to let of excess pressure, use a drain off.. there's one on the heat bank it's on the bottom left.
The prv is nice and easy to change though. Sometimes if your lucky the prvs do re-seal

 

[lame plumber]

tis why mfis say dont use as a drain off