Replies

1. 
   Scott | Jun 12, 2009 06:19am | #1

   Have you thought about how this will be vented?

   Scott.

2. 
   pgproject | Jun 12, 2009 07:54am | #2

   methinks an S trap is illegal....

1. 
   MSA1 | Jun 14, 2009 12:01am | #17

   You're right. 

   Family.....They're always there when they need you.

3. 
   allaround | Jun 12, 2009 07:56am | #3

   This assumes you're not installing a garbage disposal...

   Tie the two sink drains together with an "end-outlet continuous waste" fitting. Bring the drain line up through the cabinet floor about 10 inches or so behind the center line of the continuous waste outlet pipe and offset about 2 inches right of left of that center line.

   Use a p-trap into a tee in the drain line and continue piping off the top of the tee over to the rear corner of the cabinet and up between the sink and cabinet wall. Install an air admittance valve on the top end of that pipe.

   Don't use an s-trap, they have a tendency to siphon so sewer gas can come back into the house.

4. 
   sully13 | Jun 12, 2009 08:43am | #4

   S traps are illegal here.

   Don't know about your neck of the woods

   sully

5. 
   Hackinatit | Jun 12, 2009 12:30pm | #5

   Like this. Use a tailpiece in place of disposal if you aren't installing one.

   View Image

    

   A La Carte Government funding... the real democracy.

1. 
   DaveRicheson | Jun 12, 2009 12:41pm | #6

   Ah,....!

   A picture is worth a thousand words.

   Your AAV is suppose to be higher than the flood line.

   I know that the flood line is the top rim of the sink so you can't stick it through your counter top, but moving it up as close to the underside of the top would be safer.

   Otherwise, neat and professional work.

1. 
   Hackinatit | Jun 12, 2009 12:59pm | #7

   Your AAV is suppose to be higher than the flood line.

   You're correct and I should have commented on that. I raised the AAV position after installing the faucet... not much clearance to work in with that vent pipe in the way.

    A La Carte Government funding... the real democracy.

1. 
   DaveRicheson | Jun 12, 2009 01:17pm | #8

   BTDT

2. 
   rdesigns | Jun 12, 2009 04:37pm | #9

   The IPC and the manufacturers of AAV's do not require the AAV to be above the flood rim if the AAV serves an individual fixture or a branch drain--only stack-type AAV's are required to be 6" above the flood rim. The AAV that serves an individual or branch drain is required to be only 4" above the horizontal branch or fixture drain. This also makes it a little easier to service or replace.

   But maybe your local jurisdiction has added to the requirement? Or maybe you prefer to exceed the code.

   In answer to the OP original question, I would also recommend Hackinatit's method. This will give you the option of adding a disposer. What the picture does not show is that the tee probably has a baffle inside to force the disposer drainage to go down, and prevent forced drainage from the disposer from rising in the other sink bowl.

1. 
   DaveRicheson | Jun 12, 2009 07:20pm | #10

   When they are allowed here (it takes  prior approval by the AHJ) they are required to be above the flood plane.

2. 
   jej | Jun 13, 2009 03:36am | #12

   what i would do differently is put in a clean out and grade the dw drain to the disposal and install a air hammer to dw hot water line also i would use escutions on my pipes. 

   Edited 6/12/2009 8:42 pm ET by jej

1. 
   frankv | Jun 13, 2009 07:46am | #13

   Thanks to all for the help! I like the dwgs and it is easy to see what you guys are talking about.
   Thanks again,
   Frank

2. 
   Hackinatit | Jun 13, 2009 03:25pm | #14

   Yep...

   the drain now slopes to the DW,

   the pipes/conduit holes are caulked... and escucheons, while pretty, aren't needed,

   Hammer arrestors under the floor.

   View ImageA La Carte Government funding... the real democracy.

   
3. 
   sully13 | Jun 13, 2009 05:37pm | #15

   In my neck of the woods this set up would not work.

   The disposal should waste directly into the P trap through a T instead of wasting through the lateral tubular drain and then into the T.

   sully

1. 
   Hackinatit | Jun 13, 2009 09:33pm | #16

   Why is the DW flex drain causing so many problems here?

   Dishwasher to disposal to extension to diverting tee to p-trap to 2" drain...

   the disposal doesn't use the flex hose as the drain. It also grinds any matter that is pumped from the dishwasher before sending it into the trap.

    A La Carte Government funding... the real democracy.

1. 
   BillHartmann | Jun 14, 2009 12:10am | #18

   "the disposal doesn't use the flex hose as the drain. It also grinds any matter that is pumped from the dishwasher before sending it into the trap."My thought on that is that if it can get through that 1/2" corrugated tube than it can go through 1 1/2" drain without any more help.Mine and many that I see have the DW connected to the tailpiece on the other side of the sink..
   William the Geezer, the sequel to Billy the Kid - Shoe

1. 
   Hackinatit | Jun 14, 2009 02:35am | #19

   Valid point... but does that invalidate mine?A La Carte Government funding... the real democracy.

2. 
   BillHartmann | Jun 14, 2009 04:03am | #20

   I posted that because I did not know where this came from."Why is the DW flex drain causing so many problems here?".
   William the Geezer, the sequel to Billy the Kid - Shoe

2. 
   sully13 | Jun 15, 2009 05:20pm | #21

   No, I didn't mean that the disposal wastes through the flex tube.  I know the DW wastes through that tube into the disposal.

   What I was talking about was the fact that the disposal should waste into the Ptrap directly through a baffled T instead of having the lateral 1 1/2" tubular attached to the disposal and then going through the T and Ptrap.

   Has to do with scouring the trap out correctly.

   sully 

1. 
   rdesigns | Jun 15, 2009 06:16pm | #22

   How would you connect the disposer to the baffle T any more directly than frankv's picture shows?

   I can't think of any setup that would not require an intermediate tube between the disposer outlet and the baffle T.

2. 
   sully13 | Jun 15, 2009 08:34pm | #23

   Sorry; I am not explaining myself very well.

   I will attempt to find time to sketch it out and post later

   sully

6. 
   plumber_bob | Jun 12, 2009 07:44pm | #11

   frankv,

   A p-trap is the way to go.

   You must have the fixtures vented to insure that the p-trap can't be sucked dry.

   I will try and attach a drawing,(it's acting up when I try), of a loop vent. These are typical when a fixture is installed in an island cabinet.

   A loop vent is the only legal way to vent an island cabinet in Ky.  A 'Pro-Vent will work too, as well as some other devices.

   In the drawing, black lines show the sink, p-trap, and a standard branch drain to the house drain. The loop vent is in red and should as high as possible inside the cabinet and usually behind the sink. In Ky., all vents have to be washed by the fixture drain, (down stream).

   Blue line = floor

   Green = house drain. Make shift arrow shows flow.

   Since there are only 2 fixture units here, 1 1/2" pvc will do.

   I hope this helps...

    

    

    

    

   It is a shame that all the people who really know how to run this country, and run it right, are busy, cutting hair, driving taxi's and trucks!

   I believe George Burns said something to that effect.