simme format 80c probs

[gazgas]

read my first thread cos i fluffed it hahaha

 

[gazgas]

[h=2][/h]

i am wondering if anyone has come across this problem, i went to look at a SIMME FORMAT 80c as it was losing pressure. in central heating its fine but as soon as the old lady runs a hot tap to fill a bath u can see the pressure going down, the PRV is getting warm, but as it must be discharging into the the void under the floor ( because there is no sign of it externally on the house ) i cant see it coming out haha. anyway we know where it is goin but why and what is the best solution.
i was considering a strong chemical flush as i am suspecting the boiler is choked with crap, but think i might be opening a can of worms.

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Read more: http://www.ukplumbersforums.co.uk/central-heating-forum/47396-gazgas.html#ixzz2JTh5ATJ8

 

[kay-jay]

Any discolouration or smells from the hot water?