Mckeand13
Engineer
Below are some pictures (and a video) of my current basement plumbing. Not being a plumber, I don't know the proper venting or requirements. I'm looking for your help to lead me in the right direction. I can do the work.
The current stack goes like this, from the floor up:
It's 4" coming out of the floor.
Next up is a 4" cleanout tee.
At the top of the cleanout tee, it drops down to 3".
A couple of elbows and it makes its way to 3 tees. 1st is a toilet drain, 2nd is vent stack, and 3rd is another toilet drain.
My plan is to put a washer standpipe in and replace the concrete washtub (which currently drains to a different drain) with a plastic one. The new washtub will drain into this stack on the left.
Here's what I'd like to do:
- 4" coming out of the floor as it is.
- 4" x 4" x 2" hub sanitary tee (with the 2" pointing back towards the wall) with a trap and standpipe for the washer.
- Directly on top of the first santee, I would put a 4x4x4x2 (right side inlet santee). The 2" would point to the right and become the drain from the washtub (with a trap).
At this point, my plans don't include any venting or any other changes to accomodate venting.
Am I ok? Is any venting necessary other than, in theory, utilizing the 3" main stack from above? There isn't any venting on the washtub as it is and it's working fine. I guess it's tied into a different stack though so it's not a good comparison.
I doubt it's possible that somebody would be flushing both toilets, washer draining, and washtub draining to completely fill the pipe.
The current stack goes like this, from the floor up:
It's 4" coming out of the floor.
Next up is a 4" cleanout tee.
At the top of the cleanout tee, it drops down to 3".
A couple of elbows and it makes its way to 3 tees. 1st is a toilet drain, 2nd is vent stack, and 3rd is another toilet drain.
My plan is to put a washer standpipe in and replace the concrete washtub (which currently drains to a different drain) with a plastic one. The new washtub will drain into this stack on the left.
Here's what I'd like to do:
- 4" coming out of the floor as it is.
- 4" x 4" x 2" hub sanitary tee (with the 2" pointing back towards the wall) with a trap and standpipe for the washer.
- Directly on top of the first santee, I would put a 4x4x4x2 (right side inlet santee). The 2" would point to the right and become the drain from the washtub (with a trap).
At this point, my plans don't include any venting or any other changes to accomodate venting.
Am I ok? Is any venting necessary other than, in theory, utilizing the 3" main stack from above? There isn't any venting on the washtub as it is and it's working fine. I guess it's tied into a different stack though so it's not a good comparison.
I doubt it's possible that somebody would be flushing both toilets, washer draining, and washtub draining to completely fill the pipe.
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