Leaking Hot Water Cylinder

A customer had called out his home insurance company as he had a leak in the airing cupboard. They found the leak was coming from the hot water cylinder and would need replacing.

I visited to look at the cylinder, and after removing some of the foam lagging could see that the leak was coming from the backnut on the coil and could be repaired. I partially drained the central heating system and hot water cylinder, removing the pipe between the three-port valve and cylinder. I then loosened off the backnut, and wound some PTFE tape into the gap as can be seen in the picture below. I then tightened the nut onto the PTFE tape sealing the cylinder. I re-connected the pipework and re-filled the system and the leak was successfully solved

Disclaimer: The works described in this blog are a record of work undertaken and should not be taken as guaranteed to solve your problem. Work should only be carried out by persons qualified and competent to do so.