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Old 12-29-2011, 06:35 PM   #16
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1" dw drain end can bet cut back to hook up to standard dw tail piece..


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Old 12-29-2011, 08:50 PM   #17
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Maurice Howden.

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Old 04-07-2012, 01:56 PM   #18
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Is that trap that low (deep) legal for code?
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Old 04-07-2012, 02:39 PM   #19
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Per this photo, your dishwasher drain is below the water level in the trap:

Also, looking at the picture of the top of your sink, I don't see an airgap for the dishwater drain line.

Even if the dishwater drain hose is routed up high in the cabinet, without an air gap in the hose path, waste water from the trap can siphon back into your dishwasher if the check valve went bad. Back siphoning of waste water from the trap into your dishwasher can cause a bad smell but even worse could be a health hazard.

Strongly suggest that you either:
1. Install an air gap in the dishwasher hose line to prevent back siphoning.
2. Redo the drain plumbing so that the dishwater drain is "above" the level of the water in the trap.

If you do option-2, if you ever have a clogged drain where water backs up into the sink, you will be exposed to back siphoning of waste water back into the dishwasher if you used the dishwasher and the hose got full of water.

So the air gap of option-1 is the much preferred method as it will never allow back siphoning of waste water back into your dishwasher regardless of whether the drain gets clogged.


Last edited by Homerepairguy; 04-07-2012 at 04:22 PM.
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Old 12-30-2012, 10:45 PM   #20
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Just saw this post now. Thanks HRG. I was told that I wouldn't be able to get strainers that were more shallow for this sink...not sure where to go from here and this project has fallen off the plate at the moment.
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Old 12-30-2012, 11:04 PM   #21
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Step 1: Remove everything from the basket strainers to the piping from under that sink and toss it.

Step 2: Those basket strainers are nothing special, and you should be able to pick up a couple new ones from a local plumbing shop that are more 1/2 circle shaped as opposed to triangular which should give you an extra inch at least.

Step 3: Pick up a 1 1/2" Tee, 90, Union P-Trap, Dishwasher Wye, ABS-Copper Adapter, and (2) Fitting 1 1/2" Trap Adapters.

Step 4: Pipe it similar to how it currently is, with the dishwasher wye where you currently have the fernco fitting. Between the fitting trap adapters and new basket strainers you should be able to lift the running trap arm between the two outlets of the sink atleast 2" higher and you'll have sufficient room to have a properly graded & trapped drainage system beneath your sink.


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