Anyone know of a reliable method of re-sealing O ring joints, especially COLD water inlets on Combi boilers. Saunier Duval and Worcester come to mind as particular problems.
Even with new parts (eg SD diaphragm water valve) and new O rings with plenty of silicone grease, seems to me there's at least 50% chance of a drip-leak. On plastic joints, sealants such as LSX do not seem to work very well.
I would NOT condemn O-ring seals generally. For example, I had to take the secondary heat exchanger out of a Jaguar combi last week. Had no replacement rings and anyway they're VERY awkward to reach, facing backwards at the back of the boiler. Put the HX back in, tightened 2 hex screws and not a leak!!
Even with new parts (eg SD diaphragm water valve) and new O rings with plenty of silicone grease, seems to me there's at least 50% chance of a drip-leak. On plastic joints, sealants such as LSX do not seem to work very well.
I would NOT condemn O-ring seals generally. For example, I had to take the secondary heat exchanger out of a Jaguar combi last week. Had no replacement rings and anyway they're VERY awkward to reach, facing backwards at the back of the boiler. Put the HX back in, tightened 2 hex screws and not a leak!!
