drainage problem

[thor2]

Got called to a problem where shower tray wasn,t draining away,cleared the blockage but noticed when draining a full wash hand basin water is coming up the shower tray.The set up is shower tray waste pipe runs along the wall to the outside downpipe and a T-piece collects the water from the WHB about halfway along this pipe,the waste pipe does run downwards from the shower tray via the WHB to the outside downpipe,if just running the taps on the WHB the water gurgles at the shower tray waste and customer says it has been like this snce installed,is there any way to resolve this issue ?

 

[mountainman]

Maybe the original installer buggared the waste run up.
The way to be certain is to expose the pipework and use your own judgement.

 

[spanner]

Looks like induced syphonage! Do they shower often?? What size is the waste pipe from the shower to the sink waste T-piece to WHB ?

 

[thor2]

Looks like induced syphonage! Do they shower often?? What size is the waste pipe from the shower to the sink waste T-piece to WHB ?

Pipe from shower 40mm runs to 40mm equal T reduces to 32mm up to WHB,don,t know how often the use the shower.

 

[PlumbBobBob]

is there a swept tee joining the whb to the shower waste? or a straight tee.

 

[PlumbBobBob]

beat me lol. maybe change the tee to a swept tee or a y junction to guide the whb waste the right way.

 

[spanner]

Pipe from shower 40mm runs to 40mm equal T reduces to 32mm up to WHB,don,t know how often the use the shower.

The reason I'd asked about how often was because if its a bottle trap, they tend to somtimes hydrate, the trap is lost somtimes causing fumes from the pipe in the atmosphere. Any way the pipe sizes are sufficient and like Steve has stated, does it have swept tee from the WHB downstream to the waste outlet??
http://t2.gstatic.com/images?q=tbn:ANd9GcR7iFM9odNonyUiID3D9dofSXGfYQfdRaW64ZUrWNbwMqUAhlvc4A

 

[thor2]

Im sure it is just a straight T so will change to swept T and keep fingers crossed.

 

[SimonG]

Try an anti syphon bottle trap on the wash hand basin as well.

 

[spanner]

Im sure it is just a straight T so will change to swept T and keep fingers crossed.

Momentumnm...
:83:

 

[PlumbBobBob]

?????

 

[Bernie2]

Change tee, upsize to 54mm from whb and shower connection point, take out separately. Check discharge downpipe is not blocked and vent is clear. Durgo stuck?

 

[thor2]

Well i was wondering about a durgo because i didn,t see one,should there be one and if so in what position,also it is a shallow trap on the shower tray no room for anything else(concrete floor)

 

[spanner]

Well i was wondering about a durgo because i didn,t see one,should there be one and if so in what position,also it is a shallow trap on the shower tray no room for anything else(concrete floor)

:50urgo is an air admittance device. normally sited near WC or inside dwelling that opens to let air in.

[DLMURL]http://t1.gstatic.com/images?q=tbn:ANd9GcT12VWsrahePs94dBUXnfgJl8F16Lsx0OTf-LSTWiScRAVjaB3M[/DLMURL]

And if its a shallow trap in the shower I would suggest using the 40mm swept tee also.:clap:

 

[Mike Jackson]

Look at HepvO valves. They will act as an air admittance valve and non return valve as well as a trap.


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