have a space saver mk 2 hot water is fine but the header tank for the heating system keeps overflowing. it takes a few days for the level to rise. its not coming from the breather pipe and the feed for the ball valve is isolated.the water seems to be coming back from the radiators/hot water system. can anyone help??

duncan, October 2009

You need to get someone to check out your copper hotwater cylinder,the heating coil may have a leak on it forcing water from your domestic supply into the heating causing an overflow.
If so you will need a new cylinder.

Glen, October 2009