View Full Version : DIY dishwasher install to double sink

07-10-2010, 11:30 AM
http://sphotos.ak.fbcdn.net/hphotos-ak-snc4/hs126.snc4/36665_1441423489374_1646689589_1049299_7951467_n.j pghttp://sphotos.ak.fbcdn.net/hphotos-ak-snc4/hs126.snc4/36665_1441423529375_1646689589_1049300_4705583_n.j pg
My friend says this will work, is he right? I'm afraid I'm going to have backup. If it's not right what will work better?

Thank you :)

07-10-2010, 11:55 AM
That is wrong, wrong, wrong.
Cut the tailpiece on the left and have the p-trap grade downhill to the sink drain.

The first ruile of plumbing, is that water needs to go downhill.


07-10-2010, 12:39 PM
Are those soap bubbles on the rubber connector, too? It isn't sealed well. As plumbed, the drain line (trap arm) will fill up with food particles and crud, and block up. It has to flow downhill from the output of the trap.

07-10-2010, 06:56 PM
Actually, there is no good way to connect whichever side gets the dishwasher. I would use two "P" traps on that installation, but the "branch tee" is still going to make that one hard to connect properly.

07-10-2010, 07:24 PM
basically you need to cut the wall open and lower the san tee in the wall ! !

Drainage water " does " not run uphill you have to get that lower in the wall that is

all there is to it !

Once you do that the rest of the sink plumbing will come together the right way ! !

07-11-2010, 06:46 AM
There are three inviolable cardinal rules of plumbing.

1st rule: things flow downhill. You have created worse than a deep trap, which is a problem in itself. You have a serious crud catcher.