Dishwasher isolated from the kitchen sink.

[Newguy]

K i think I can explain this question best using a few photos.

First we have the problem.
This is a render of the possible kitchen we will be putting in, and the question is how to best hook up the dishwasher to the main drain. when its so far from the sink. Its a very small kitchen

http://img.photobucket.com/albums/v37/rsawarhawk/Kitchendescription.jpg


one solution we've used before, In the house we are currently in.
but we don't know if there is a better way.

http://img.photobucket.com/albums/v37/rsawarhawk/dishwasherrig.jpg

as you can see we need it too go straight into the main drain. Is there a fitting that does what we need it to do?
Or is what we've done before about the best way?

[Mr T]

In your case, you'd do something similar to a washing machine. Run your drain line up from below, go through a trap (not a plumber, but think its a "s" trap you need). the dishwasher hose sticks into the drain just like your washer. You must have a air gap where the dishwasher hose connects.

Also your dishwasher manual will list a requirement for how high the drain must be. Ours also had several diagrams on how to install this drain in several situations including yours.

I would also clamp the drain hose to the back wall or something. The drain hose will kick a bit when the drain process starts, you dont want it falling out. Plus you dont want the drain hose to fall out when you pull the dishwasher out or push it into the opening.

Another hint. When you run your hot line to the dishwasher, try not to make it the last stop in the run. If possible run your hot to the dishwasher, with the tee as close as possible to the washer, then run to your kitchen sink.. This way you can run your sink till the water is hot, then fire up the dishwasher.. You'll suck in hotter water and it will take less time and energy to heat. (giving you a shorter cycle). Otherwise depending on whereyour heater is, when the thing fills you may get no hot water at all into it by the time its done filling (it doesnt use much water). 60 degrees to 140 degrees takes alot longer then going from 110-120 to 140 degrees.

[DUNBAR PLUMBER]

The best way to hook up a dishwasher is to have an Air Gap that is drilled into the top of the countertop where the dishwasher is.

From there, you can direct connect to the drain system. The picture you have of actual work is not by any means, code.


Dishwashers produce sterile utensils used for humans in eating, drinking, cooking. Plumbing Principle #15 specifically states at no time can you tie directly into a waste system in this way without a means of protecting the device from backflow.

[Newguy]

The best way to hook up a dishwasher is to have an Air Gap that is drilled into the top of the countertop where the dishwasher is.

From there, you can direct connect to the drain system. The picture you have of actual work is not by any means, code.


Dishwashers produce sterile utensils used for humans in eating, drinking, cooking. Plumbing Principle #15 specifically states at no time can you tie directly into a waste system in this way without a means of protecting the device from backflow.

:D yeh I figured what we did on our current dishwasher was not up to code.

Wouldn't the air gap look out of place by itself on the countertop? or is there different types available, Then the one I am thinking of I don't have a picture on hand..

thanks for responding :)

[DUNBAR PLUMBER]

Yes. It will look out of place, but it is the safety factor that overrules that minor factor.



It is a decision you will have to make for yourself and your family as far as safety goes. Too many case histories of cross-connections that I know of that would never let me compromise the safety and well being of my family.