Recent content by Dave33

A question, please. If Fernox DS_40 was used and small leaks did appear in the heat exchanger, what would you do? Would a leak additive help?

This is a 24year old Spacesaver 75 'S' plan system.Been a problem for some time but is getting worse and recent descaling & flushing made no difference. When thermostat switches the boiler off, the pump continues but does not disperse the heat, so gurgling water very noisily pushes up in both...