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Andrew Smith
Andrew Smith, Plumber
Category: Plumbing
Satisfied Customers: 3767
Experience:  City and Guilds qualified plumber
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We have a central heating system that is loosing pressure because

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We have a central heating system that is loosing pressure because of a leak. We have established the position of the leak. The gas board have tried to solve the problem with sealant but this has not worked. The leak has been caused by a nail piercing the pipe. Is it worth us trying a really high grade sealant again beofre trying to repair the pipe which would involve digging up part of a concrete floor!
You will never seal a nail hole with that stuff.Best to expose the pipe (it will only be under a thinb screed usually 20mm thick), clean it up and try and solder the hole shut.If that does not work then cut it where the hole is and use a socket (either soldered, compression or push fit) and close it back together.If you do not want to do any of that then try and reroute around the leak and leave the pipework in place.
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