Washing machine & sink waste

[BB78]

My washing machine waste is currently connected to the sink waste & trap via an extended pipe which seems a bit daft as the main waste pipe runs behind the w/machine, can I put the sink on a normal P trap & add a U bend or P trap & T connection halfway along the run (behind the w/machine) with a short length of pipe coming out of the top of the T connection to form a stand pipe? The proposed set up effectively means the sink will have to drain through 2 P traps, I'll keep the same gradient on the waste pipe but will this work/be ok?

Washing Machine & sink waste

• BB78
• 4 Sep 2015

 

[Dan Robinson]

Don't put two traps in line. Use a tee. But otherwise yes... the setup you have now is a horrid way of doing things.

 

[BB78]

Don't put two traps in line. Use a tee.

Sorry what do you mean? I thought the w/machine had to have a trap before connecting to the main waste.
I can't get to where it connects to the boss to change anything there & can't add too much bulk or else the w/machine will stick out too far from under the worktop.

 

[Dan Robinson]

Sorry about the picture... Talking on the phone at the same time.

If you can't do the equivalent of this, perhaps with a HepVo trap instead, then you have the reason why it is plumbed add it is.

 

[Dan Robinson]

http://www.hepvo.com/

 

[BB78]

Need to fully read about the HepVo trap & get my head round if & where it would fit but as for your drawing the w/machine is the other side of the sink, the waste flows from right to left so the w/machine is between the sink & the boss connection if that makes sense.

 

[Dan Robinson]

On your drawing then, swap the WMC trap for a tee with the Branch being vertical. Then put a HepVo trap with running adapter and a little bit of pipe. Then put the WMC hose into that. Job done. 15 minutes tops.

 

[BB78]

Like this?

 

[Dan Robinson]

Yarp.

 

[BB78]

Marvellous. Thanks very much.

 

[BB78]

Am I being thick or something, finally got the correct HepVo valve after being sent the wrong one but I can't see how the running adaptor connects, the PDF on wavin's website says 1 no. 40mm valve 1 no. 32mm running adaptor for w/machine yet the instructions inside the packaging say 1 no. 40mm running adaptor - which is it? I can't see how the 32mm adaptor fits the 40mm valve.
http://www.wavin.co.uk/web/download?uuid=e52d6bdb-da08-46bf-a313-ab1331dfba17
Also how do I connect to the tee, it doesn't just screw on? Do I need a small piece of pipe to connect them or another running adaptor?

 

[BB78]

Does anyone know?? I've tried calling Hepworth but all I'm getting is someone's v/mail.
32mm or 40mm running adaptor and how to connect to the tee?