Question

Hi, I have a 2001 Swift Challenger 530se the problem is my hot water tank heats ok but when I wake up in morning and switch hot tap on there is no hot water, and no water just air in the system until tank fills back up. Is this due to the inlet housing leaking water back out through the night. Thanks

Answer

Yes, it appears that the water is leaking back through the system. There should be a non-return valve at the input to the hot water tank. If there is no non return valve present then you should fit part 137353 if you have flexible water hose or part 137758 if you have 12mm semi rigid pipe.