Check bathroom layout please

[Pghsebring]

In FL, slab on grade, 5 x 8 bathroom, the 2” roof vent and 3” sewer are preexisting. Any errors? Intentionally wet venting w/c so when hands are washed after toilet it washes out line, lav arm is less than 2ft. 3” C/o under floating cabinet. 45s used to offset stack to match preexisting offset. I’ll use longsweep 90s at floor.

 

[wwhitney]

Per the IPC, all you need is the portion below. In other words, the parts I deleted are not doing anything useful in the DWV system.

One caveat, not sure if the CO is supposed to be over by the W/C; I'm not so familiar with cleanout requirements. But changing the wye by the WC to a 3" and putting a 3" CO in the wall on lav drain would provide CO access to most of the 3" lines, as well as eliminating some more pipe.

BTW, for the shower to be wet vented as below, the total fall in the 2" shower trap arm, from the trap outlet to the 3x3x2 wye, is limited to 2". Meaning that 2" pipe can be up to 8' in length if you achieve a perfect 1/4" per foot drop; or some what shorter if it drops more steeply.

Cheers, Wayne

 

[Sponsor]

 

[Pghsebring]

Per the IPC, all you need is the portion below. In other words, the parts I deleted are not doing anything useful in the DWV system.

One caveat, not sure if the CO is supposed to be over by the W/C; I'm not so familiar with cleanout requirements. But changing the wye by the WC to a 3" and putting a 3" CO in the wall on lav drain would provide CO access to most of the 3" lines, as well as eliminating some more pipe.

BTW, for the shower to be wet vented as below, the total fall in the 2" shower trap arm, from the trap outlet to the 3x3x2 wye, is limited to 2". Meaning that 2" pipe can be up to 8' in length if you achieve a perfect 1/4" per foot drop; or some what shorter if it drops more steeply.

Cheers, Wayne

Thank you. I'll probably do something like this then. The cleanout is where it is because it is out of sight under the floating vanity and allows access to 3in lateral. I'm not familiar with cleanouts for wall hung toilets, but I know there is no space underneath, it would have to be in a bedroom behind this bathroom which I do not want. I could upsize the 2" vertical to 3" and put the cleanout in there, but what's the difference?

 

[wwhitney]

Your layout would be simpler if you just use the 3" spur going to the cleanout to be your lav drain. I don't see the advantage of having the lav drainage connect closer to the WC to wash more of the 3" line. Certainly it's not required under the IPC.

Cheers, Wayne

 

[John Gayewski]

Most plumbers in practice pull a toilet instead of using a cleanout unless the cleanout is in the right place, generally they are not.

 

[Reach4]

Most plumbers in practice pull a toilet instead of using a cleanout unless the cleanout is in the right place, generally they are not.

Wall hung toilet is going to make that harder.

 

[John Gayewski]

Wall hung toilet is going to make that harder.

No sir. Depending on the model i guess it could be hard, but any of the times ive done this i go pull the toilet, call the drain cleaner, then come back after they clear the blockage. Toto wall hung toilets are pretty easy to take on and off. Carrier type fittings for wall hung toilets are even easier. Depending on how long they have been there you might not even need a new gasket. I don't think the totos even use a gasket. It's like a gasketed 90 or something, it's been a while.

 

[Jeff H Young]

My area in so ca on new home construction from mid 80s to 2005 ish places i worked and contracted myself basically we had useable clean outs in all houses and in the vast majority one main in front going to street then on upstream we would have another withen 5 ft of a toilet or in a wall or outside house in ground or in wall or outside for upstair end of line stack