I currently have one waste trap in utility room but adding dishwasher to it but what is the best way to set this up on one wall? I would rather have all pipes on the back wall so they are out of sight as I understand how to put a tee on and could have one on the end wall and one on back wall with their own u bends. But hoow can you set this up on the one back wall with only one u bend and both having their own waste trap pipes? Can u have pipe at top of u bend, then use a compression tee junction, with one waste trap pipe come out of top of this and then use 90 degree compression on tee and have another wate trap pipe out of that? So only one u bend but 2 waste trap pipes?


Not sure I've explained this very well but hope you know what I mean. Any help greatly appreciated or links to images or websites that can help.


I am aware of a double spighot thingy, but would rather each have their own trap pipe.


Thank you very much in anticipation of any help.

You would normally use a Universal Dishwasher and Washing Machine Trap - 40mm and extend where necessary the units drain hose.
Are you thinking of fitting one on the back wall nearer the units and plumbing the outlet to your
present drain system?
Consideration would then be levels and the top connection which normally fits under the sink, might need an extension to vent it high enough not to allow an overflow, if and when both machines empty simultaneously.
More chance of spillages in the utility room if a blockage occurs downstream.

Just a different point to stress when extending the waste out of you appliance. I had this done to a washing machine bought from Howdens (Lamona brand I think) which was required due to the layout on the Howdens kitchen plan. The washing machine developed a fault after 8 months and when engineer came out to repair it he told me the extended hose invalidated my warranty.

To save any grief put an appliance on either side of sink if you can

Or run a length of 40mm pipe along back wall at an angle with a vertical piece on the end to accommodate the waste for the furthest away appliance (which is what was done to fix my problem) . As aeromech3 says be aware of overflow if pipe added is to low hope that makes sense


Cheers
James

Sorry forgot to mention The engineer that came to fix the washing machine re-fitted the original shorter waste hose pipe that was luckily still there lying on floor under the kitchen units then repaired the machine under the warranty for free, this meant the waste was not attached to anything so a plumber ran some 40mm pipe as suggested above which sorted it all out.