Tub floods into shower

[Terry]

Raise the santees as high as you can, a long drop to the p-trap is not as good.
The ABS needs support every four feet. Yes, support the shower for sure.

 

[wwhitney]

Raise the santees as high as you can, a long to drop to the p-trap is not as good.

FWIW, 24" is the maximum allowed by the UPC, which calls for "as short as practicable."

Chapter 10: Traps and Interceptors, California Plumbing Code 2019 | UpCodes

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Cheers, Wayne

 

[Sponsor]

 

[ElHead]

Raise the santees as high as you can, a long to drop to the p-trap is not as good.
The ABS needs support every four feet. Yes, support the shower for sure.

Reduce the 1.5 straight and Add a 2” coupling here in the green?

I have one and some short 2” scrap

 

[ElHead]

Like this?

For the tub: With a 1/4” slope (according to the bubble level) that puts the very bottom of the p-trap at 24” from the subfloor.

 

[ElHead]

And About 21” from bottom of the shower trap to the subfloor.

 

[ElHead]

And for the hell of it I just took about an inch off of that vent pipe because it was pretty chewed up.

So I got that much closer or more to the joists and subfloor

 

[wwhitney]

If you really want to raise the san-tees, you could cut the galvanized vent above the double top plate, and put your no hub coupling up there. With the first san-tee side inlet just below the joists, in your top plate notch. Not sure if it's worth the trouble to recut.

With stacked san-tees, minimum drop would be, from top to bottom: 1-1/2" no-hub - ~2" long piece of 1-1/2" ABS (1" into no-hub, 5/8" into san-tee top hub, 3/8" margin) - 2x1-1/2x2 street san-tee - 2x2x1-1/2" san-tee

Cheers, Wayne

 

[ElHead]

Thank you Wayne. "If it's worth the trouble" is the key! But you've described the combination perfectly and thank you for that.

I'll do some measuring and give it consideration. It probably doesn't make a lot of difference but all my couplings have hubs. That's the stop in center yes? Or have I misunderstood that term?

 

[ElHead]

Wayne, there are a few obstructions to navigate above the double top plate.

I guess the upside would be not needing extra hangers to support the pipe

 

[Terry]

I would stay below the joists if they are 2x8 or less.

 

[wwhitney]

Wayne, there are a few obstructions to navigate above the double top plate.

I suggested putting the no-hub coupling above the top plates, with the (top of) side inlet of the upper san-tee just below the bottom of the joists.

Cheers, Wayne

 

[ElHead]

Thank you Wayne, I misunderstood you. Now I understand.

 

[Jeff H Young]

I like the advice of keeping the trap arms up high as to keep tailpieces shorter As Terry said . references by Wayne of max 24 inch tailpiece, the " as short as practical" tells us that for basically nothing you are building it with quality No need to kill yourself with rework but something I try to practice.
I like the shower on top for reasons Terry mentioned I think makes sense, I Thought to meet code it was wrong but I agree and believe shower on top would likely out perform .

 

[ElHead]

I had no way to cut the vent above the plates so I just took off another 1” at the bottom end and adjusted the rest.

It’s all glued in place. Thanks for everyone’s help and advice. Prior to this project I would end up here on different occasions for all manner of plumbing and fixture information (we have a Toto washlet). This has been and continues to be a great source of plumbing knowledge and advice. Have a great weekend and a Happy 4th of July, thanks again!

 

[Tuttles Revenge]

I had no way to cut the vent above the plates so I just took off another 1” at the bottom end and adjusted the rest.

It’s all glued in place. Thanks for everyone’s help and advice. Prior to this project I would end up here on different occasions for all manner of plumbing and fixture information (we have a Toto washlet). This has been and continues to be a great source of plumbing knowledge and advice. Have a great weekend and a Happy 4th of July, thanks again!

So now for the moment of truth... did this re-work stop the flooding of the shower from the tub?

 

[ElHead]

So now for the moment of truth... did this re-work stop the flooding of the shower from the tub?

Success, NO FLOODING!

Thanks again!