Double Sink Incorrect Plumbing?

[Will T.]

Hello, my contractor installed kitchen double sink this way. The main drain is of an old house and quite high. I was using a single sink before with no problem. Now with the new double sink, the water drain flow from one sink to the other

Did he make a mistake? Thank you

 

[hj]

You probably have a partial stoppage in the drain and it would happen no matter how you connected them.

 

[Sponsor]

 

[Taylor317]

Sounds like partial blockage, the way the drain is hooked up is....okay....not how most plumbers would do it but it’ll work. Usually you would get dual sink drain kit and use one p trap..at least in Indiana you would, I’ve heard some codes require individual traps on dual sinks

 

[Kenny4]

Just curious, why no disposal in the kitchen sink.

Kenny

 

[Reach4]

Just curious, why no disposal in the kitchen sink.

Disposal needs the trap output at the wall to be over 6 inches lower than the bottom of the sink. There could be additional reasons, but that one is clear in this case.

 

[Sylvan]

Why a clean on one trap and none on the other?


A decent plumber while there is no trap usually snakes the lines before installing the traps the access is a lot easier

 

[Reach4]

Why a clean on one trap and none on the other?

Cleanouts at the bottom of a p-trap are useful? Can you run a snake in thru there, or is that just for getting solids from the bottom of the trap?

In Will's case, I see the worm gear clamp at the wall. I am wondering if that could be loosened and the piping detached at the wall. That would leave a snaking point I think.

Will, is this over a basement or accessible crawl space?

 

[Sylvan]

"Cleanouts at the bottom of a p-trap are useful? Can you run a snake in thru there, or is that just for getting solids from the bottom of the trap?"

Depending on what is thrown down the sink

For example some lady allowed a handi wipe to got down the drain (she had a full opening drain outlet no basket strainer and when it was caught on the end of a cable it could not be taken out of the CO

Normally a CO does allow for snaking

 

[Doug777]

This install was done by a conscientious plumber who knew that the high drain with a traditional single trap was going to exacerbate the harmless, but irritating bubble ooze one gets when washing dishes in a double sink. Installing a double trap here is the mark of a consummate professional.
The slow draining has everything to do with the existing plumbing behind the wall, not the double traps.