Kitchen Wastes

IanShaw · Posted: Fri Aug 10, 2007 7:17 pm Post Subject: Kitchen Wastes

Is it acceptable to have a main run of 38mm waste pipe to the outside drain then connect 32mm wastes from dishwasher, washing m/c and sink unit into the 38mm pipe? This is to save running three separate pipes through the outside wall.

Softus · Posted: Fri Aug 10, 2007 11:54 pm Post Subject:

You can combine the wastes, but the minimum pipe size should be 40mm (inside diameter), not 38mm. I don't actually know where you'd get 38mm pipe.

Also, for the washing machine, you should fit a stand pipe if you can, rather than just tee in to the waste from the other sources.

ChrisR · Posted: Sat Aug 11, 2007 12:20 am Post Subject:

If the common pipe is any length (over half a metre, say) then 50mm would be better.

Dan_Robinson · Posted: Sat Aug 11, 2007 8:50 am Post Subject:

Why not get a sink trap with two connections for dishwasher and WMC?

If is a long run then you might need an AAV.

__________________
Regards

Dan Robinson

If I was right half as much as my wife was wrong I'd be a very happy man

IanShaw · Posted: Sat Aug 11, 2007 12:10 pm Post Subject:

Thanks for your suggestions guys, I'll probably go for the 50mm main run and stand pipes from the wmc and dwshr.

IanShaw · Posted: Fri Aug 24, 2007 7:46 pm Post Subject: Kitchen waste pipes

Thanks for your advice guys. Job done with 40mm main run, 1 stand pipe at end of run from dshwshr in 32mm and a connection into sink waste from wmc. All tested and ok. Many thanks. Ian S.