Pipe work pressure

[Thoggy]

Hi all
I have fixed all my pipe work for a central heating job, fixed rads and piped up but shally he lock shield and trv to off so I can test the pipe work and not have to drain it all now I've put it to 2bar to check for leaks, over night it has dropped a small fraction, just under 2bar I've checked the joints but some were really awkward in corners is there any reason for the loss other than a dodgey joint?
Im going to obviously fill up and run with temperature but wanted some advice as to another possible cause.
many thanks Martyn.

 

[SimonJohns]

Did you use plastic or copper

 

[Thoggy]

All copper mate there's is a speed fit elbow and a couple of cap ends but all pipe work is copper. There are a couple of iso valves on where I'm going to take off and put rad on just easier to fit them to drain off, the other rad is going on tomorrow.

 

[grahamgas]

Are you testing with water or air?

 

[Thoggy]

Water

 

[Doodlebug]

Think its natural you will lose a very slight amount of pressure over night. I wouldn't worry too much but obviously test hot and cold and leave on test overnight again.


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[Thoggy]

The only reason I'm paranoid it cause I did a favour for my brother at Christmas by putting him a rad in, he has since tiled the floor but 9 months down the line has said there is a wet patch under the rad, obviously I'm now doubting myself but wouldn't put it paste him to have screwed into a pipe when fixing ply board.

 

[Subby]

That's just the pressure settling. Leave it another night if you are paranoid, see that it drops no further, have peace of mind.

 

[AWheating]

it could be air movement or more likely temp changes. If it was me id fill the lot up and get it hot, hot ,hot you will soon know if theres a problem.