Water temperature

Jellybaby_1

What should the highest temperature of water be in the taps/rads. Ours is 40 degrees and never any higher, I'd have thought it should get higher when its switched on for several hours. Just to say neither hubby nor I know anything about heating systems. Just wondering if anyone here can answer.

John.G

Domestic Hot Water should be ideally kept at 60C to 65C or the whole cylinder heated to this temperature at least once a week to prevent legionella.
If the rads never get above 40C then, except you have separate hot water and radiator boiler controls, the hot water temperature will never get above 40C.
If you look the airing cupboard you should see a thermostat strapped to the cylinder approx 1/3 rd from the bottom, this will have settings, probably 15C to 80C stamped on it and the setting can be changed to 60C if not already at this setting. This is of no use if the boiler set point (on the boiler front) is only set to 40C and should be increased to 65/70C.

Jellybaby_1

Thanks for replying. We'll check that out. The warning about legionella is frightening!