Got called out yesterday to a system overflowing. It was one of those DIY efforts - there were 6 header tanks / cisterns in 3 loftspaces. The main DHW header consisted of 2 20-gallon ones linked together (with one of them stagnant). There was an oil boiler with indirect cylinder at one end of the house and a direct cylinder fed from immersion at the other. The previous occupant had put gate valves on the inlet and outlet of each cylinder and a pipe linking the outlets of both, with a valve on it. In the past, someone had turned off the valves to the indirect cylinder and the water had expanded and popped the bottom out, forcing it up and distorting all the pipework. Plastic pipe was literally draped over nails on roof timbers like a festoon. The huge stretch of CH pipework is all in 15mm so the end rads don't work properly. There are 2 working header tanks I never managed to work out what they were for.
Anyway the guy has had nothing but trouble with it and so I think I've managed to convince him to have a complete system replacement.
Anyway the guy has had nothing but trouble with it and so I think I've managed to convince him to have a complete system replacement.
