Help with sink drain project

[hobo123]

I need to add a dishwasher tee to my plumbing. I have an old house with a high drain outlet. With the tee, the drain outlet is too high. What can I do to make this work? You can see in the picture that the p trap needs to come up about 1.5 inches. Would it be so wrong to raise up the right side a couple inches?
Thanks!

 

[joshuameares]

If raising it puts the horizontal run higher than the dishwasher spout then you may have backflow issues in your dishwasher

 

[Solid]

Is it OK to have an outlet in that location?

 

[IFIXH20]

Is this a one or two compartment sink

 

[johnjh2o]

His problem is that even with the DW tee cut down as much as possible the trap ends up lower then the waste line. He needs to find a DW tee with the branch higher on the tail peace. There is another way to solve this but it's not the best way to go. I know I asking for a lot of criticism on this one but his only other choice is to open the wall and lower the waste line. He can install the trap backwards. That will make a deeper trap seal but it will work.

John

 

[hobo123]

@IFIXH20: Single compartment sink.
@joshuameares: won't high loop in drain line prevent back flow?
@Solid: I don't know.

 

[hobo123]

I was also thinking, what if I put a second trap off of a wye, and hooked the dishwasher directly up to it with this? http://www.kent.ca/kbs/en/product.jsp?prdId=7023519&skuId=7023519&catalogId=1481

 

[hobo123]

@johnjh2o Tried your idea, Is this a legit setup? What are the downsides?

Thanks!

 

[johnjh2o]

There are two down sides. One is the tail piece has very little slip into the trap. The other is the lower part of the DW branch will hold water. What I am noticing in your 2nd picture is you are using a very deep basket strainer. If the strainer was a little shorter you may not need to reverse the trap.

John

 

[hobo123]

Is the dw branch holding water going to cause problems?

 

[johnjh2o]

First off I like your cork.
It shouldn't be a major problem as long as you don't allow much grease or food waste down the kitchen drain. Just be sure you loop the DW hose up as high as possible. The less line that holds water the better off you will be. Also try not to bump the trap when taking things in and out from under the sink. It wouldn't take much to knock that trap apart.

John

 

[IFIXH20]

Water may come up in the sink when the dishwasher drains. The dishwasher drain line needs to be ran up high under sink to prevent water from running back into the dishwasher and to help dishwasher drain proper. Wolverine Brass makes a P-Trap with double swedge, meaning it is a true reversable trap , this will prevent the tail piece from sliping out.
Google Wolverine Brass double swedge p-trap.

 

[joshuameares]

I would have to agree the strainer basket does look real deep. I would look for one a little shallower.

 

[phishfood]

Water may come up in the sink when the dishwasher drains. The dishwasher drain line needs to be ran up high under sink to prevent water from running back into the dishwasher and to help dishwasher drain proper. Wolverine Brass makes a P-Trap with double swedge, meaning it is a true reversable trap , this will prevent the tail piece from sliping out.
Google Wolverine Brass double swedge p-trap.

That is awesome, I have been wanting something like that FOREVER! Thanks many times over.

 

[phishfood]

As for flipping traps over.

In the multi family (apartments and condo) plumbing field, I have seen more than my share of drains roughed in too high. While I can make a trap installed backwards hold water , I have seen lots of leaks because of it. And it takes very little to knock one loose.

I won't install a trap backwards for my own business, and will only do it in my day job if my boss knows about it and agrees to it.

These double swedge traps that IFIXH2O has posted about look like the cat's meow.