"newshound" wrote in message
...
You'll find the same, only cheaper, at www.bes.co.uk, in all different
"flavours" (male inlet, female outlet etc). Their search tool is a
nightmare but the catalogues are good
I should have added that, in my experience with combi boilers, once they
have been leaking the seats get irrevocably damaged and it's quick, cheap,
and easy to replace them.

BES part numbers are

17107
11346
11347
12346

Between £5 and £6 plus vat