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Old 02-04-2012, 10:40 PM   #16
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kitchen sink disposal drain trap problem


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Originally Posted by mystic_cobra View Post
I understand your description of how to lower the drain pipe that goes out the wall and I appreciate your assistance.

I'm asking if I can insert some piece of pipe between my metal trap and that 90 deg bend (where the white thread tape is in this picture below) that would lower the trap so I could make the connection without cutting into the wall?

As for posting pics on forums, I upload them to imageshack (free pic hosting) and then link to it from the forum post.

Good luck finding something to do that. That has a ground joint mating surface where the tape is. If thats the method you choose to fix it, just turn the J piece 180 degrees and add an extension at the disposal. But by doing this, your trap is now extra deep so it will be more pron to plug

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Old 02-05-2012, 01:19 AM   #17
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kitchen sink disposal drain trap problem


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Can you post a better picture?
The first picture in my first post is probably the best. It shows the waste pipe headed out to the wall and the disposal exhaust at nearly the same level.

The final picture shows the J-trap pipe connected to the waste pipe.

Is there something specific I can take a pic of that will help?
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Old 02-05-2012, 08:47 AM   #18
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kitchen sink disposal drain trap problem


a wider angle shot would help
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Old 02-06-2012, 09:19 AM   #19
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kitchen sink disposal drain trap problem


Tough to get a wide angle shot from under the sink. Here's a couple more...

From the right side of the disposal...You can see the original metal pipe with the 90. I think the 90 is zinc coated or something bc it is original and looks unusually good for its age. Is this copper or some other metal?


From the front left side


So, a buddy came by yesterday who does house renovations. He suggested I unscrew the 90 and get an adapter to transition to PVC. Then get a standard trap kit for a sink and it will have all the pieces I needed to drop the trap down so that I can connect to the disposal exhaust without cutting up any walls. Does that sounds realistic?

Last edited by mystic_cobra; 02-06-2012 at 10:17 AM. Reason: clarity
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Old 02-09-2012, 07:47 AM   #20
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kitchen sink disposal drain trap problem


I located a fernco fitting that has a rubber molded sleeve on the inside sized for copper on one end and pvc on the other. It has a metal sleeve that goes around it with two radiator-style clamps. Looks like a nice piece.

If I can find the right collection of pvc pipes, which shouldn't be too tough, I should be able to hook this up.

The plumbing supply had a pvc trap that was larger pipe than what I've seen at HD, Lowes. He said it's the same 1.5" at the connections, but it looks like the pipe you put inside walls vs what I usually see under a sink. Other than the obvious physical difference, what's the difference? Can both be used interchangeably?

Does the code specify a minimum distance that the water must drop from the disposal to the drain pipe?

Should have done this a while ago but I've got a buddy bringing me a DIY plumbing book.

Last edited by mystic_cobra; 02-09-2012 at 07:54 AM. Reason: clarify
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Old 04-13-2012, 09:13 PM   #21
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kitchen sink disposal drain trap problem


A couple of procedural questions...

Does the code specify a minimum distance that the water must drop from the disposal to the bottom of the trap?

Also, is there a minimum or maximum distance (height) for a kitchen sink trap?

Found this image googling that suggests it should be between 1.5" and 4". Can any plumbers confirm this?
http://www.showroom411.com/Media/CMS/2010/1643_R.jpg

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