responsiblejon
New Member
I'm in Indiana, and my 1962 house has a 10'x5' bathroom in the basement. The basement bathroom was plumbed like this and functioned without incident, the toilet gurgled a bit when flushed but that might just be the old stool. I've identified several things on this drawing that I believe to be incorrect.
Horizontal use of sanitary T and double combination wye are not correct, and it seems to me that none of the fixtures are properly vented (especially the floor drain turned shower drain), but and have just been sneaking air out of the whatever is available from the 3" DWV from upstairs when its not draining water. Since I've got the floor open and I'm replacing the drains with PVC, I've decided to relocate the shower a bit.
This is my proposed repipe.
The major changes include adding a branch line for this basement bathroom group to separate it from the upstairs branch line, and reducing the branch lines to 3" PVC under slab instead of 4" until they meet the main line. I've tried to create a wet vent for the shower and the toilet with the lavatory. Since the shower needs to be on the far side of the main drain, I either have to cross over to connect to the other fixtures in the bathroom, or connect directly to the main line and then create another vent. There is enough drop to have everything sloped 1/4" per foot. Running it this way removes the T cleanout from the main line, but I plan to add a double cleanout on the main line just outside of the bathroom. It would be 6' from where the line exits the house.
Here are my questions
Is it bad practice to have drain pipes cross over other drain pipes like I've done with the shower and main line?
Should I install a dedicated cleanout on the lavatory 2", or is it Ok to just snake from the lavatory sanitary t?
After the lavatory passes the sanitary t, should it remain 2" as a vent or should it reduce to 1-1/2 before it heads to the attic and joins the rest of the vents through the roof?
I would appreciate any feedback,
Thanks!
Horizontal use of sanitary T and double combination wye are not correct, and it seems to me that none of the fixtures are properly vented (especially the floor drain turned shower drain), but and have just been sneaking air out of the whatever is available from the 3" DWV from upstairs when its not draining water. Since I've got the floor open and I'm replacing the drains with PVC, I've decided to relocate the shower a bit.
This is my proposed repipe.
The major changes include adding a branch line for this basement bathroom group to separate it from the upstairs branch line, and reducing the branch lines to 3" PVC under slab instead of 4" until they meet the main line. I've tried to create a wet vent for the shower and the toilet with the lavatory. Since the shower needs to be on the far side of the main drain, I either have to cross over to connect to the other fixtures in the bathroom, or connect directly to the main line and then create another vent. There is enough drop to have everything sloped 1/4" per foot. Running it this way removes the T cleanout from the main line, but I plan to add a double cleanout on the main line just outside of the bathroom. It would be 6' from where the line exits the house.
Here are my questions
Is it bad practice to have drain pipes cross over other drain pipes like I've done with the shower and main line?
Should I install a dedicated cleanout on the lavatory 2", or is it Ok to just snake from the lavatory sanitary t?
After the lavatory passes the sanitary t, should it remain 2" as a vent or should it reduce to 1-1/2 before it heads to the attic and joins the rest of the vents through the roof?
I would appreciate any feedback,
Thanks!