high pressure and loss of water to outside drainpipe Help and information on all topics relating to your central heating, air conditioning and ventilation issues.

[stugal]

we have a worcester 24i,the pressure rises when heating on to between 2.5--- 3.5, there is also a loss of water thru the outside drainpipe when this occurs Any solutions please

[DONFRAMAC]

I have been told by the plumbers installing my new condensing combi system, to expect to have to bleed the rads. once per month ond restore running pressure to at least 1 bar using the filling loop, then remove the loop, refitting the blanking caps to prevent passing valves from trickle-feeding into the system, which would cause blow-off. If your anti-corrosion additive is up to strength, there should be less generation of hydrogen in the rads., by water/steel corrosion. Have it checked and fortified at your annual service.