Is This an Acceptable Drain Configuration?

[Russell Stevenson]

Will someone please be so kind as to give advice on my plumbing plan. This place is 720 s.f. slab on grade, so I'll be cutting concrete. It is located in Nashville. I will be pulling a permit. Am I on the right track?

Thanks Very Much,
Russell

View attachment 51865

 

[Reach4]

Turn the tee at the top of the WC 3-inch the other way. You may not need the vent line for the wall-hung. If you did, a wye and a 45 would be better than that santee and 90, but if you used the santee, you would invert it also.

Toilets are special. They siphon on purpose, so the vent needs are different.

I am not a plumber.

http://www.co.lincoln.or.us/sites/d..._-_helpful_hints_residential_construction.pdf

 

[Sponsor]

 

[Russell Stevenson]

Thanks, Reach4.

Does it look better, now?

 

[Reach4]

Yes. Others may have more, and can say whether you could skip that wall-hung toilet vent.

 

[Russell Stevenson]

Thanks Again.

 

[Terry]

The kitchen sink isn't vented.
The toilet can't have the kitchen as a vent.
A bathroom group can wet vent a toilet, but not an upstream washer. The lav can wet vent the wall hung if it's run in 2".

 

[Russell Stevenson]

Thanks, Terry

I will make changes and try again.

 

[Russell Stevenson]

Hello,
I made some changes. Hopefully I will do better, this time. Thanks very much for your help.

 

[Terry]

The sink looks better, but it' still can't enter above the toilet. Giving the toilet it's own vent would be better there.

 

[Russell Stevenson]

Thanks, Terry.

The Lav and the Kitchen sink are now vented together. Whadda ya think?

 

[Russell Stevenson]

Attached is my latest iteration. I moved the lav drain above the sink drain and I deleted the 2" vent next to the wall hung toilet.

 

[Russell Stevenson]

Hello Again,
I hope I'm not being a pest, but I wonder if I could get a yea or nay on my latest attachment. In particular, can the bath lavatory drain above the kitchen sink? And, is the 2" lavatory vent acceptable venting for the wall hung toilet?

Thanks for the help.

 

[Reach4]

Split off the vent for the lav 42 inches or more above the floor. That drain as 2 inch can wet vent the shower.

Otherwise, vent the shower separately, and join the kitchen drain line with the lav drainage.