Leaking push fit fittings

[riksony]

thanks for the feed back, I must explain the air was leaking out of the collar of the fittings, when I spayed them with leak detector they bubbled like crazy. I changed over to a water test and the same fittings stayed dry.

 

[Stigster]

I think that as described in the air test procedures, you have gone way over pressure in this medium (plastic pipe/fitting + air). I think that the air molecules are just able to slip by the seals whereas water does not.

 

[riksony]

Thanks Stigster, I feel you could be right, its still holding water test of 4 bar so I think I will leave things alone now.

 

[ShaunCorbs]

Thanks Stigster, I feel you could be right, its still holding water test of 4 bar so I think I will leave things alone now.

8 bar the water test should be

 

[riksony]

With Irish pex the makers ask for 6 bar for 1 hr and 3 bar for 15 mins, working pressure from there on. I did this with water after the air leaks and put it up to 4 bar and it has held since. Do you think I should put up the pressure

 

[ShaunCorbs]

With Irish pex the makers ask for 6 bar for 1 hr and 3 bar for 15 mins, working pressure from there on. I did this with water after the air leaks and put it up to 4 bar and it has held since. Do you think I should put up the pressure

yes 1.5x your incoming pressure

 

[PhoenixServices]

Do exactly as the manufacturer States and take photos. (Not that they prove much) but bum covering is the goal.

 

[zzzjim]

Air test ,very temperature sensitive , and has poor heat removal/equalize ability .
(But leaks easier to clean up - so long as don't get Shot in the bum )

 

[hammers4spanner]

I remember a guy i work with hydraulic tested to 50 bar comp fittings blowing off all over lol .

 

[SJB]

Back in my early days first fixing newbuild totally in plastic (polypipe or osma pushfit) we used to take the rothenberger tester up to 18bar for an hour, if something was gonna go it usually went about 12 and it went good and proper. Used to bring a change of clothes on a Friday with four or five first fixes to test.