Hi, I have part underfloor heating & part radiator system.
The boiler is losing pressure, so I feel there is a leak somewhere.
I've noticed the underfloor heating manifold hisses around the flow gauges when the heating is turned off (when cooling)
Is it normal to hear hissing at manifold or could the pressure drop be coming through air leaking. No leaking water is visible at all.
The boiler is losing pressure, so I feel there is a leak somewhere.
I've noticed the underfloor heating manifold hisses around the flow gauges when the heating is turned off (when cooling)
Is it normal to hear hissing at manifold or could the pressure drop be coming through air leaking. No leaking water is visible at all.