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Correct Under Sink Plumbing?

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Old 04-13-2012, 10:13 AM   #1
kris77 [OP] kris77 is offline
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Correct Under Sink Plumbing?

Short story, My garbage disposal is going bad, so im going to replace it. I'm having the problem now everytime i turn on the disposal, crap comes up in the other bowl of the sink.

Whats the correct way to plumb a disposal under a sink.

Mine looks like this now...


Just add a disposal on the left side. I'll try and get a pic tonight.
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Old 04-13-2012, 10:23 AM   #2
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Not sure if this is the correct way but if I were to add a disposal, I'd make the trap straight under the disposal and the other sink bowl T in below the disposal. Otherwise, The T you have in the center should have something in the middle to direct the water down to the trap so water can't easily pass through the T and come up the other bowl.
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Old 04-13-2012, 10:25 AM   #4
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Quote:
Originally Posted by Pugga View Post
Not sure if this is the correct way but if I were to add a disposal, I'd make the trap straight under the disposal and the other sink bowl T in below the disposal. Otherwise, The T you have in the center should have something in the middle to direct the water down to the trap so water can't easily pass through the T and come up the other bowl.
This

EDIT I forgot how a disposal works they go out the side, not the bottom, so this no workie.
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Old 04-13-2012, 10:26 AM   #5
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This is what mine looks like, but drain down instead of back
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Old 04-13-2012, 10:33 AM   #6
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Quote:
Originally Posted by JonnyBb View Post

This is what mine looks like, but drain down instead of back
Mines like this too
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Old 04-13-2012, 10:45 AM   #7
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Quote:
Originally Posted by SnowroxKT View Post
This

EDIT I forgot how a disposal works they go out the side, not the bottom, so this no workie.
Shit, forgot they come out the side
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Old 04-14-2012, 06:22 AM   #8
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Hey OP, I was mistaken. The first pic I posted was similar to what I had in my first house. My current house is set up with a trap off the garbage disposal which goes to a T before the drain. The sink side then has a trap that connects to the other side of the T. It doesn't back up quite as bad.
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Old 04-14-2012, 06:29 AM   #9
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Here it is:

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Old 04-16-2012, 04:18 AM   #10
kris77 [OP] kris77 is offline
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Quote:
Originally Posted by Rupp1 View Post
Here it is:

This makes sense having a 90 attached to the disposal then going over to the straight pipe going down to the trap. Wonder if that "T" is a straight "T" or a directional "T"?
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Old 04-17-2012, 12:02 AM   #11
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Quote:
Originally Posted by JonnyBb View Post
Hey OP, I was mistaken. The first pic I posted was similar to what I had in my first house. My current house is set up with a trap off the garbage disposal which goes to a T before the drain. The sink side then has a trap that connects to the other side of the T. It doesn't back up quite as bad.
Dude, if this is your sink, you need to get the drain hose from the dishwasher higher otherwise the dirty water, food, etc from he disposal can go in the hose.
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Old 05-07-2012, 06:30 PM   #12
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Thats a 1st. I have never seen a 4'' line brought up under a sink like that b4?
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Old 05-30-2012, 05:24 PM   #13
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What you are looking for is a continious waste. This will connect the disposal to the p-trap for the waste to go down
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Old 05-30-2012, 05:33 PM   #14
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If it is backing up its most likely due to your drain being plugged. As a plumber that would be the first thing I'd check. You'll most likely find that to be the problem.
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