A real brain teaser, its got me beat

[Derrick229]

Is there (or has there been) an outside tap or watering system?
Is there a heating pipe leak and valve 3 supplying the F&E tank as well as bathroom?

Nope, as I said, the outside tap is fed by BV no 2, along with the cold supply to the boiler (the pressure in the boiler isnt dropping either, on the heating side)

 

[john.bell55]

I think you will need to go back to the beginning.
Isolate and pressure test each part of the system.
You are getting a leak somewhere

 

[Derrick229]

I think you will need to go back to the beginning.
Isolate and pressure test each part of the system.
You are getting a leak somewhere

That I know, according to the meter, but I have wrapped EVERY joint with clean dry tissue, they are all dry, the pipe is exposed

It is all up to mains pressure, which is at the moment minimum of 1 bar

 

[easyt]

If you joints are OK.Assuming that the No 3 valve was already fitted, could you have disturbed other existing joints connected to pipe lengths that you have worked on?

 

[Derrick229]

If you joints are OK.Assuming that the No 3 valve was already fitted, could you have disturbed other existing joints connected to pipe lengths that you have worked on?

I installed no 2 and no 3 valves, ran new copper to the bathroom and to the bath

 

[WaterTight]

How did they work out they had a leak? Were they just looking at the meter when they saw it going round?

Logically a fault on the metre would occur continuously wouldn't it? Since you can make it run with one valve rather than another there must be a leak. If you can't see it that doesn't mean it's not there. You must have failed to check something. Painstaking, lengthy search needed. Is all pipework surface? Surely some must be hidden.

 

[Derrick229]

How did they work out they had a leak? Were they just looking at the meter when they saw it going round?

Logically a fault on the metre would occur continuously wouldn't it? Since you can make it run with one valve rather than another there must be a leak. If you can't see it that doesn't mean it's not there. You must have failed to check something. Painstaking, lengthy search needed. Is all pipework surface? Surely some must be hidden.

They saw the meter was working (they were having a new kitchen moved and fitted anyway) even when no 2 valve to the granny flat was isolated, I put in a new valve no 3 and no 2 valve (they just had a ballfix valve fitted) and ran new pipe to the bathroom

1, the pipe is exposed, but at some point it will be behind plaster board

2, I open valve no 1 and have both valves 2 and 3 open, meter runs, close valve 2, meter still runs, close valve 2, open valve 3, meter runs, close valve 3 meter stops, open valve 3, taps shut, BV in WC closed, meter runs, tissue round every joint dry, now no puddles, no damp patches, all pipe visible

How much of a search can I do ? it has gone on for some time now, I have put in new pipe, now logic tells me if there is a leak, there will be some kind of a sign, but there isnt anything

 

[nez]

hi

i was wondering if u shut the 2nd and 3rd valve and left valve one open, is the water meter still ticking over if so valve to mite be shot if its a ballafix its comman or bs 1010 then then new washer or dodge jumper letting water through. just a thought from a unexprinced plumber.

 

[nez]

sorry ingnor my post i'll only just read the rest of the pos.

 

[Derrick229]

hi

i was wondering if u shut the 2nd and 3rd valve and left valve one open, is the water meter still ticking over if so valve to mite be shot if its a ballafix its comman or bs 1010 then then new washer or dodge jumper letting water through. just a thought from a unexprinced plumber.

With no 1 open and no 2 and no 3 shut, no the meter dont move (there is only 18 inches seperating all 3 valves)

All valves are brand new (they are stopcocks, not ballfix valves)

Any replies are appreciated