Pressure testing underfloor heating

The correct way two do it is fill it to working pressure and leave it seven days, then and only then can the floor be screeded or layed over it its then left another seven days and vthe it can be heat tested. Long boring process which need to be planned well.

 

Your right Dave it is a very very boring process and one that I try not to get involved in lol

 

Yes,but remember different manufacture's specify different test pressures through to commissioning.

 

Fill system with water and remove all the air -that's very important, make sure all loops are open on manifold, then pressure test from fill point to the recommended pressure for that product.Then screed floor as Dave said earlier(leave for seven days), the pressure will rise as the screed cures that's normal.After test is over it has to be heated in stages,starting low temp up to working temp normally over another seven days.I've probably missed something because as I said earlier it's all very long winded and boring lol

 

What work has been carried out that makes you think someone may of hit the pipes?

 

If system has been tested it should be charged with water?
Each loop to be filled separately remove air.
All loops open to test.

 

All sounds too complicated to me. I'm an engineer, not a plumber. If we did a pipe run, ( HP gas at 3500 psi) then we would pressure test hydraulically to 1,5 times x working pressure. If the gauge dropped, then yes, we had a leak. And yes, you must vent all the air from the system first !!!

 

Remove all air because you need air out off the loops anyway to run the system at the end.The install should of been tested with water not air as air will compress water will not.

 

Yes,there should be a lock off on each one.

 

Yes leave full of water,,lock off's are on the flow metres once they are set to correct flow/lpm