Kitchen sink drain height problem

[Mirage_Man]

Hello all, first post here.

I am in the process of remodeling our kitchen. New granite counter tops and a stainless steel under-mount sink are going in as part of the remodel.

I'm in Florida. Our house was built in 1973. It's a block home and the wall the kitchen sink is on is on an exterior wall (which is block). When the house was built I guess there weren't many deep sinks going in homes around here. The sink I pulled out was only like 6" or 7" deep. All the new sinks we are looking at are 10" deep and add more depth for under-mount.

So here is my issue. The drain line is centered around 17" off the floor. On top of that it's centered behind the drain on the side of the sink we would prefer the disposal to be on. I did a rough mock up of where the disposal will sit using one of these deep sinks (see attached pic). I figured the top of the disposal will be will be about 12" down from the underside of the counter top after mounting to the sink. So based on this mock up the disposal's drain is almost even with the drain line... UGH I'm not a plumber but I am assuming that this is not good, that it should be higher that the drain line. Am I right?

Finding a shallower sink could be an option but at this point since the kitchen is already tore up and we really like the deeper sinks, if need be I'll move the drain line. I'm just not sure what's involved or if it's something I want to tackle myself.

Any tips, advice or experience welcome.

 

[Terry]

At least it was at 17". My standard rough in 73 was 19" which is differently too high for a 10" deep sink. Back then 8" was the deepest.
If the line from the wall is slightly lower, then at least the disposer drains. Did you check the height with the basket? That adds a bit too.
The p-trap is a bit harder to install when you have so little room to work with, but doable.

 

[Sponsor]

 

[Jadnashua]

The outlet of the P-trap (the trap arm) should drop 1/4" per foot...close may not be a problem. THe P-trap's outlet can be rotated anywhere horizontally and still work fine.

 

[Mirage_Man]

At least it was at 17". My standard rough in 73 was 19" which is differently too high for a 10" deep sink. Back then 8" was the deepest.
If the line from the wall is slightly lower, then at least the disposer drains. Did you check the height with the basket? That adds a bit too.
The p-trap is a bit harder to install when you have so little room to work with, but doable.

Yes, the 12" I figured includes the basket/mounting bracket for the disposal.

This is all just guestimated atm. The counter top is not installed and I don't have the sink yet. I built the new sink base from scratch myself to replace the original cabinet that was trashed. If I have to pull it back out to get to the wall to move the drain line I figure now is the time to do it BEFORE the counter top goes on.

 

[Mirage_Man]

The outlet of the P-trap (the trap arm) should drop 1/4" per foot...close may not be a problem. The P-trap's outlet can be rotated anywhere horizontally and still work fine.

I wish I knew what you meant. LOL I'm not a plumber. Now ask me about carpentry and electrical and I'm right there with ya.

 

[Reach4]

I figured the top of the disposal will be will be about 12" down from the underside of the counter top after mounting to the sink. So based on this mock up the disposal's drain is almost even with the drain line... UGH I'm not a plumber but I am assuming that this is not good, that it should be higher that the drain line. Am I right?

Your picture appears to put the center of the output of the disposal maybe 1/2 inch higher than the center of the drain in the wall. That should be good.

 

[Mirage_Man]

OK guys finally got the countertops installed and with that the sink. I've installed the garbage disposal. Here are a couple pics of where its sits in relation to the drain line.

What do you think, will it be alright as it is? If so any recommendations on the best way to plumb it?

 

[James Henry]

Somebody should have warned you to put drain outlet on the left side of the cabinet.

 

[Mirage_Man]

Somebody should have warned you to put drain outlet on the left side of the cabinet.

That's where it was. It would have been a nightmare to move it. I'm in Florida, block exterior wall. I know I'm going to have to go both directions with it. Was thinking I'd go over to the other side with a T which has the trap on the bottom then back over to the wall. If that makes sense. It won't be the most efficient but pretty much my only option as I can see it.

 

[James Henry]

Pictures can sometimes be deceiving but it doesn't look like you'll be able to hook that up without moving the disposal to the other sink. like I said sometimes pictures are deceiving.

 

[Mirage_Man]

Pictures can sometimes be deceiving but it doesn't look like you'll be able to hook that up without moving the disposal to the other sink. like I said sometimes pictures are deceiving.

Guys... I just have the outlet rotated to the back to show the height of the drain outlet of the disposal in relation the the drain line. If you look at the first picture you can see the outlet pointing towards the other sink. There is enough clearance to have the drain line after the trap on the opposite side to run behind the disposal. Not sure if the makes sense.

 

[James Henry]

If you can squeeze a 45 degree fitting off the drain outlet between the disposal you may succeed.

 

[Reach4]

I hope that coupling isn't glued, so you can put in the elbow that would probably be needed if the disposal stays on the right.


How about putting the disposal on the left?

 

[Dj2]

Yes, try the GD on the left sink, you may be able to make it work. If not, get creative with 45* and some cut to size pipe.

 

[Mirage_Man]

So it's a 60/40 sink and we want the disposal to be on the 40 side. And no the coupler is not glued on it's just pushed on. Had to keep the fumes out while I was building the cabinet. I'm going to do my best to make it work as it is. Fingers crossed I can.

 

[Reach4]

Maybe take a bottom view photo, under the drain pipe.

 

[Mirage_Man]

OK so here's where I'm at now. There's plenty of room to run the pipes I just need to know if it's OK to put some kind of riser out of the p trap to get it high enough to be at the proper elevation to run down to the drain line?

 

[Terry]

You can swivel the p-trap.

You have ABS out of the wall. You need ABS pipe and glue for that.
Also and ABS trap adapter.

I wish with the deeper sings they would redesign the p-traps with less height on the end. Please remind me to call them on Monday and ask for a redesign of their standard p-traps.
In the meantime, they do make the one that reverses. Not my favorite way to fix this but at least in makes the connection.

A reversed p-trap

 

[Mirage_Man]

You can swivel the p-trap.

You have ABS out of the wall. You need ABS pipe and glue for that.
Also and ABS trap adapter.

I have abs glue. I know I can swivel it but the line oming off the p trap to the drain is too low as it sits. Can I put a riser to get it higher?

 

[Bannerman]

I have abs glue

But the white pipe and fittings you show are PVC.

Terry showed the correct ABS fitting in his photo in post #18.