Possible Air lock.

[SAMSHONG]

New shower tray installed raised to give reasonable fall. Wast runs to a normal trap from there to a 90 degree right hand then to a 90 degree down through floor to soil pipe. Water starts to run away fine then stops and doesn't move for ten fifteen mins. Piping is the same as before just new tray?

Any ideas anyone?

 

[SAMSHONG]

The problem is beyond the waste and the first run as if I disconect the run of pipe from the waste it is full of water so the issue lies between the first 90 degree bend and the drop to the soil pipe.

Thanks

 

[gas4you]

Hopefully you will have some rodding eyes on the 90 bends. Sounds like a build up of gunk or maybe something fell down waste during shower install.

 

[Bahco]

Take it all apart and clean it out.

 

[SAMSHONG]

A clear mind and good advice helps problem fixed old builders debris inone of the bends added to by my disturbing piping caused blockage