Flexicom 30cx losing pressure

[Timmy_T]

Hi Guy's,

Had a flexicom 30cx fitted about 6 months ago and all has worked well until the last few days when the pressure bleeds off (1 bar down to 0.2) over a period of about 6hrs.

I've scoured the house for leaking rads, all ceilings are clear (all pipes run under upstairs floor boards, then down and back up for the downstairs rads as the floors are solid) and I can't find a thing.

I isolated the heating side of the boiler last night by closing the heating flow/return valves and the pressure dropped by 0.2 bar, but I believe this can be caused by the system cooling.

Has anyone any ideas of what to do next, apart from rip up all the floorboards to physically check all the pipes?

 

[lightning]

Pressure boiler to 2.5 bar to show any leaks,i found most on radiator valves.

 

[Timmy_T]

Will that much pressure damage the system?

 

[Timmy_T]

Crikes! just done that and it now bleeds off in about 2 mins!

Still cannot find any leaks

 

[lightning]

If you pressure system to 2.5 bar turn off flow and return valves leave for a few hours.

If pressure has not dropped then its not your boiler

If when you open up valves and pressure go,s down its your pipework or radiator valves.

When you bump pressure upto 2.5 bar and close valves turn off boiler

 

[Timmy_T]

If you pressure system to 2.5 bar turn off flow and return valves leave for a few hours.

If pressure has not dropped then its not your boiler

If when you open up valves and pressure go,s down its your pipework or radiator valves.

When you bump pressure upto 2.5 bar and close valves turn off boiler

Thanks for that, I'll pop off and do it now. Am I ok to leave the hot water side of the system on?

 

[Timmy_T]

Thanks Lightning for your help, have finally found a leaking pipe joint under a floor board via a damp ceiling!!