Is this a valid method for plumbing a dual kitchen sink?

[Mikieboyblue]

I have to actually replace this because it back slopes toward the sink and I need to make sure the drain wasn't compromised by whomever or whatever caused that extensive stud decay / charing.

Is using a why like this legit under IPC or UPC?



Thanks!
Mike

PS. Yes I realize you shouldn't drill through the king and trim studs in a load bearing wall and under a window, but it was already like this. The holes are virtually notching the 2x4. I will probably try to sure up the damaged one.

 

[Twowaxhack]

It use to be done like that in various places in the country. Some inspectors will still allow it. It works fine.

 

[Mikieboyblue]

Is an alternative:

Trap adapter > trap arm > p trap > T > branch to each drain?

Or... P trap > combo wye > branch to each drain?

I think I have see a San T used instead of the combo wye.

 

[Twowaxhack]

Very common here to find whats pictured above. You could replace the San tee with a combo or wye+1/8 bend (45)

 

[Mikieboyblue]

View attachment 31250

Very common here to find whats pictured above. You could replace the San tee with a combo or wye+1/8 bend (45)

Very cool Sir. I will go with that type of install instead of the wye on its side.

 

[Mikieboyblue]

Pretty close to 1/4" slope per foot and 18 3/8 on center at the elbow. Thanks for the help @Twowaxhack !

 

[Twowaxhack]

Put a level on the face of that 90 turned out of the wall and let the bubble bump the line. You almost want it plumb, just a little rolled up is all.......not much at all.

Loosen your band and adjust as needed.

 

[bbp]

18 3/8 is pretty high for a center line. I am always at 15" or less. Undermount sinks,granite,extra deep bowls yada yada yada

 

[bbp]

You probably wont get a disposal in there at that height,gonna be close.

 

[bbp]

View attachment 31250

Very common here to find whats pictured above. You could replace the San tee with a combo or wye+1/8 bend (45)

I like the 2x1 1/2x 1 1/2 tee idea but you cant disassemble the p-trap. I used to use an 1 1/2 san tee like that but without a baffle in the tee I was getting complaints about food coming up in the other bowl occasionally. I cant discharge into disposal either. I like seeing work from other areas.interesting.

 

[Twowaxhack]

I like the 2x1 1/2x 1 1/2 tee idea but you cant disassemble the p-trap. I used to use an 1 1/2 san tee like that but without a baffle in the tee I was getting complaints about food coming up in the other bowl occasionally. I cant discharge into disposal either. I like seeing work from other areas.interesting.

Yeah, it’s permanent just how I like it. Never had any food shoot up onto the other sink with the 2x tee.

Theres a cleanout in the wall and if I need to clean the trap arm I just remove the left hand basket to run my cable.

 

[Twowaxhack]

Here’s what I removed......

 

[Mikieboyblue]

Put a level on the face of that 90 turned out of the wall and let the bubble bump the line. You almost want it plumb, just a little rolled up is all.......not much at all.

Loosen your band and adjust as needed.

Like so?

 

[Mikieboyblue]

18 3/8 is pretty high for a center line. I am always at 15" or less. Undermount sinks,granite,extra deep bowls yada yada yada

Yeah, kinda working with what was already here. I actually dropped it a bit. It was at a crazy angle. I don't plan to put a disposal in (at least to start). This is am apartment.