I wonder if anybody can help me. I am having problems with my heatline S30 Combination boiler. The connection from the three port valve to the primary heat exchanger is leaking at the connection to the heat exchanger. The connection is a push fit and just seems to use O rings to make the seal. Can I just replace the O rings and should I use any jointing agents. Any advice would be appreciated.
This is presumably with a clip to prevent the joint coming apart. Yes if you can find the right O-ring you should be OK. Obviously you'll need to drain the boiler down. If you want to use something to help then a little silicone grease (not sealant) should help. Note that the corrent O-ring replacment may look quite a bit bigger than the worn one.
Sounds like a very old model if it has a 3-port valve (a la central heating Y-plan system) in it. I confess I've not heard of it (unless it's the Worcester with the chocolate-brown panel at the bottom and the compartment at the top with the pressure gauge on it). I'd guess it has a standing pilot light and is pretty inefficient, in which case you probably ought to be thinking of replacing it before much longer.
Anyway, wrt the O-rings: yes, clean up mating surfaces, find correct-size O-ring (hah!), apply silicone grease, reassemble, hope/pray ...
Its a relatively new boiler, 2004 fitted. see
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