fitting auto-bleed valve to radiator

[lukeinman]

STAGE 2

we can rule out your expansion vessel, but not the PRV and pipework to outside

you have a Pressure Reducing Valve inside boiler that lifts at 3 bar to dump excess pressure to outside. Have a look at this pipe outside, is it dripping? are there signs its been outputting water?

if PRV and pipework are dry, you can fill boiler to 2 bar and close flow and return isolating valves under the boiler, and leave for a decent length of time (12 hrs) central heating and hot water cannot be used during this test time, boiler to be electrically isolated

if pressure on gauge down= leak from boiler

if pressure on gauge NOT down, open iso valves. if gauge drops=leak in pipework,rads,radiator valve connections

hope this helps

Sounds like a plan, thanks very much. I will try this tomorrow, should I turn the electric to the boiler off?

 

[glasgowgas]

if you go down the road of isolating flow and return, then yes as you dont want combi firing up as you have no circulation through system

i know its getting cold here, double check all rad valves with a bit of tissue, check round all connections that you can see, if anything is damp, no matter how slight, it indicates a leak

remember a pressurised system means that anything that comes out HAS to be put back in, or your gauge will show a drop in pressure

 

[lukeinman]

if you go down the road of isolating flow and return, then yes as you dont want combi firing up as you have no circulation through system

i know its getting cold here, double check all rad valves with a bit of tissue, check round all connections that you can see, if anything is damp, no matter how slight, it indicates a leak

remember a pressurised system means that anything that comes out HAS to be put back in, or your gauge will show a drop in pressure

Thanks again mate, looks like the dogs will be cold while I'm at work tomorrow,

 

[kevplumb]

they have got fur

mind so nas GG

 

[MarkRainbow]

Just foor the record PRV is a Pressure RELIEF Valve not a Pressure REDUCING Valve which is something else entirely.

Call me pedantic![/u]