shower will not hold 60mm

[Jonhardybuilder]

shower will.not hold more then 60mm when doing a test, any more it pushes the water out of waste

 

[moonlight]

60mm? pushes out of waste where?

 

[Jonhardybuilder]

60mm? pushes out of waste where?

onto the shower tray,water flows back in to trap and holds at 60mm

 

[moonlight]

Outlet too flat or partially blocked.

 

[Jonhardybuilder]

Outlet too flat or partially blocked.

May be the trap too flat it self, but the waste pipe has a good fall, it's about 3m to stack

 

[Ric2013]

shower will.not hold more then 60mm when doing a test, any more it pushes the water out of waste

Are you doing a pressure test on the waste system? Are you saying that a pressure sufficient to raise a column of water more than 60mm is blowing past the shower trap.

If so, why are you testing at 60mm when industry standard test is 38mm?

 

[Jonhardybuilder]

Are you doing a pressure test on the waste system? Are you saying that a pressure sufficient to raise a column of water more than 60mm is blowing past the shower trap.

If so, why are you testing at 60mm when industry standard test is 38mm?

yes doing a presure test
I was always led to believe we test at 100 for 5 mins on final test. I'm doing a pratice test before I plaster everything up and cant get to anything

 

[Ric2013]

Not sure about the pipework (i.e. if you were to blank off traps), but NVQ level 2 teaches 38mm for 3 minutes with traps fitted, based on ADH (IIRC).
Why would you pressure test a 50mm WC trap with 100mm pressure? To be honest, I'm surprised the WC trap didn't let air pass...