vantage c120 unvented cylinder
How the hell do you change the Temp Relief vlv??
How the hell do you change the Temp Relief vlv??
take the old one out, put new one in.......simplesvantage c120 unvented cylinder
How the hell do you change the Temp Relief vlv??

In the CC ?

Er....
The OP is an RGI and qualified to work on them.
Its just that we should not be giving advice on an open forum about work which should only be done by a qualified person as that would encourage a DIYer to have a go.

Just because he is qualified to work on UVs does not mean that he knows every vagary of a Vaillant design.

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