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warrior58d 04-10-2013 08:46 PM

Moving a drain
 
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I'm installing a new sink in a new countertop and the sinks are about three inches lower and set more toward the middle of the counter top or about 3 inches closer to the wall then what the house was plumbed for. I need input on if I am on the right track. I have ABS coming into the house all the way to the top of the pea trap and then the normal screw connectors for the rest like to the disposal and the left drain. Now since this stuff is welded I would assume that some cutting is necessary. My plan is to cut just before the first turn down and then get a fernco coupling and run all PVC the rest of the way just so I can have some ability to shorten and lengthen things slightly as I put everything back together. Does this sound correct and if not how would you do it.

funfool 04-10-2013 09:44 PM

sounds fine to me. I do wonder why some use abs and glue everything in place.
I think it is more out of convenience to the plumber, he already has a stock pile of these fittings and parts on his truck and just builds it in place.
But helps nobody if it needs to be modified later, just cut it all off and toss it in the trash.
I think I would cut it where you suggested and do exact same thing. :thumbsup:

Javiles 04-10-2013 09:56 PM

one poblem is you can not change the depth of the trap. if the pipe coming out of the wall is to high unfortunetly youll need to go back in to the wall and lower the waste arm or the sanitary tee depending on how its piped. i am sure youll find multiple ways of piping it in unfortunately they will not meet code and may create secondary problems in the future.

warrior58d 04-10-2013 10:04 PM

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Quote:

Originally Posted by Javiles (Post 1156556)
one poblem is you can not change the depth of the trap. if the pipe coming out of the wall is to high unfortunetly youll need to go back in to the wall and lower the waste arm or the sanitary tee depending on how its piped. i am sure youll find multiple ways of piping it in unfortunately they will not meet code and may create secondary problems in the future.

Yea I was a little worried about that but what if I use one of the fernco eccentric series. I think it would just give me enough downward but still keep a level grade to the main pipe. I am talking half an inch down so far even with the ABS stuff

warrior58d 04-10-2013 10:28 PM

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Also let me be a little more clear. I have plenty of room to mount to the sink. I guess my issue Is that the disposal exit to the right is just about a half inch lower. If not less then the drain part on the left. As water doesn't go uphill is there any fix for this other then a different disposal? I have cut and moved the connection as much as I can down into the p-trap.

Javiles 04-10-2013 10:33 PM

I think if you go with the tubular p trap you just might make it, use a trap adapter coming out of the wall and go 1 1/2 tubular vs welded type what you have.

Javiles 04-10-2013 10:37 PM

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the more common tubular type on some of these types of traps you'll find lower necks on the j bend then others

warrior58d 04-10-2013 10:42 PM

Quote:

Originally Posted by Javiles (Post 1156581)
I think if you go with the tubular p trap you just might make it, use a trap adapter coming out of the wall and go 1 1/2 tubular vs welded type what you have.

So right after the cut shoud I use a fernco coupling down to 1 1/2 then a downturn then the trap adapter then the tubular p trap then up toward the sink?

warrior58d 04-10-2013 10:53 PM

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Kinda like this??? Also looking at it the drain for the disposal is just a smidge higher if not equal to the drain? Would that be an issue??

djlandkpl 04-11-2013 06:58 AM

It looks to me as if the disposal discharge is HIGHER than the waste arm coming out of the wall. If it is, you're golden. No need for the Fernco.

warrior58d 04-11-2013 08:53 AM

Quote:

Originally Posted by djlandkpl (Post 1156707)
It looks to me as if the disposal discharge is HIGHER than the waste arm coming out of the wall. If it is, you're golden. No need for the Fernco.

It is slightly higher the the hole in the wall but I can get the connections any lower to attaché the disposal so need to lower the p trap just a touch and want to switch to PVC but I thought welding abs and PVC was a no no so was going to fernco the PVC to the abs at the wall

djlandkpl 04-11-2013 09:21 AM

Quote:

Originally Posted by warrior58d (Post 1156764)
It is slightly higher the the hole in the wall but I can get the connections any lower to attaché the disposal so need to lower the p trap just a touch and want to switch to PVC but I thought welding abs and PVC was a no no so was going to fernco the PVC to the abs at the wall

Get one of these in ABS.

https://encrypted-tbn0.gstatic.com/i...7ZbrF8M7IaAKMo

You are using "PVC Tubing" not sch 40 PVC. PVC tubing is not glued, it's held together with slip joint couplings.

https://encrypted-tbn2.gstatic.com/i...im9W8UrwSy3Pxg

warrior58d 04-11-2013 09:31 AM

Quote:

Originally Posted by djlandkpl (Post 1156784)
Get one of these in ABS.

https://encrypted-tbn0.gstatic.com/i...7ZbrF8M7IaAKMo

You are using "PVC Tubing" not sch 40 PVC. PVC tubing is not glued, it's held together with slip joint couplings.

https://encrypted-tbn2.gstatic.com/i...im9W8UrwSy3Pxg

So the trap adapter will need to be glued/welded once I cut right and then PVC from there on.

djlandkpl 04-11-2013 09:53 AM

Quote:

Originally Posted by warrior58d (Post 1156797)
So the trap adapter will need to be glued/welded once I cut right and then PVC from there on.

Correct. Make sure to pick up a 1 1/2 inch adapter. They are sold in 1 1/2 and 1 1/4. That's the side of the whole with the nut.

warrior58d 04-11-2013 11:25 AM

Quote:

Originally Posted by djlandkpl (Post 1156812)
Correct. Make sure to pick up a 1 1/2 inch adapter. They are sold in 1 1/2 and 1 1/4. That's the side of the whole with the nut.

I picked up a 1 1/2 but it looks a LOT smaller then the drain tube in the wall


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