Potterton performa 30he

[Umpkin_2000]

Morning, as per the subject, i have a performa 30he, and have a little water dripping from one of the little holes where the pressure differential valve goes onto the diverter valve, where the two grub screws are, i may just replace the differntial valve rather than just the seal.

All i really need to know is do i need to drain down the radiator system (isolator taps have never been touched, so dont want to disturb them), or just the dhw side, same as when doing the diaphram.

Since this has started dripping i lose pressure on the gauge too, assume this is connected?

Thanks for any replies.

 

[cross thread]

Yes drain heating

 

[Umpkin_2000]

Perfect thank you.

 

[Umpkin_2000]

Just to check, is it a seal between the differential valve and the diverter valve, as mine is leaking from the join between them with the grub screws, but ordering parts i dont see a seal included?

 

[gas112]

dont go to the expense of a new valve use this service kit it has everything you need for 25 quid. The smallest O ring goes at the back of diaphragm housing there is a small nut where pin comes out its in there . Then change the nut were the grub screws go into . That is the two places they leak .

Pardon our interruption...

 

[Umpkin_2000]

Great stuff, thank you very much.

Cheers