The problem of slow flow and air locking has developed over a year. The hot water tank (heated by electric element is situated at floor level in the bathroom airing cupboard and fed from an open cold water tank 4 feet above the hot water tank. Cold enters at the bottom hot exits from the top. I realise that due to the lack of height the pressure will be low but this problem was not apparent in the past. Any ideas
JamieG
JamieG