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View Full Version : Dual drain sink to a Single Drain Sink


chesleejones
Sep 13, 2009, 11:06 PM
I am removing my old dual drain kitchen sink and installing a single drain sink. Where the PVC comes out of the wall will be too far left of the drain on the single bowl sink. I was wounding what would be the best configuration. I would prefer not to bring the PVC further to the left inside of the wall. Can I run like a "45" over and use my old S trap up to the single drain. Would this run into any problems not having the PVC go straight into the wall but doing a 45 then in? Thanks for the help.

cyberheater
Sep 14, 2009, 05:00 AM
You want the most direct passage for your drain. More horizontal angles would mean opportunities for more clogs. I did have to do this as a temporary solution, but I used a 22.5, not a 45 and I made sure I positioned it not too close to the trap or the point to which it exists through the wall for the best flow.

If you can move the sanitray T (or vertical fitting) so that you can position the drain for direct passage without any angle is the best solution.

Do you mean P trap instead of "S trap". (An S trap will siphon itself).

speedball1
Sep 14, 2009, 05:18 AM
Can I run like a "45" over and use my old S trap up to the single drain. Would this run into any problems not having the PVC go straight into the wall but doing a 45 then in? You may use the 45 to pick up the trap but your post is confusing.
You speak of a "S" trap going into the wall but "S" traps go into the floor not the wall.
Sooo, what is it? A "S" or a "P" trap? If you have a "S" trap I would advise installing a AAV,(Air Admittance Valve) on a sanitary tee before dropping through the floor. Regards, Tom

chesleejones
Sep 14, 2009, 06:23 AM
Sorry it must be a P trap then. The drain goes into the wall not the floor

speedball1
Sep 14, 2009, 06:53 AM
Use the 45. That's the way we pick up our traps when we have to pipe to them. Good luck, Tom