RLrobinhood
Member
what is a "trap primer"?
So the bathrooms are stacked and have roughly the same floor plan? For completeness, can you draw on the floor plan above the DWV configuration for the upstairs bathroom (not shown in your pictures), to the best of your knowledge?
In particular, the lavatory should have a dry vent, and I'm curious how its drain is routed. E.g. through the wall studs to join the 3" stack?
Cheers, Wayne
A photo of the 3" stack just below the floor joists, showing how the lav drain, tub drain, and WC drain all join the stack would be good. Just to be sure that's all compliant.The ground floor bathroom lavatory sink is vented up in the wall and then over to the 3" stack in the wall. The drain goes down the wall and through the floor to a cavity between the floor joists. Then it runs over to the 3" stack. This is a 4' horizontal run before it goes into the stack.
A photo of the 3" stack just below the floor joists, showing how the lav drain, tub drain, and WC drain all join the stack would be good. Just to be sure that's all compliant.
Cheers, Wayne
Close. Vent the laundry standpipe at least 4 inches after the U of the p-trap but before the pipe turns down. So you will need only two basement vents for these: one for the lavatory, as you drew, and one for the laundry standpipe.See my drawing below. red is 3", green is 2"
Like what Reach4 said, and you don't need to go as big on the pipe sizes. Blue is 1-1/2" (but you can use 2" if you prefer for some reason). The length of the laundry standpipe trap arm can be anywhere from 4" to 60" (from the trap outlet to the san-tee), I'm not trying to show a particular length, just the connectivity.On the laundry room wall plumbing. I like the idea of not crossing pipes. Could I upsize the horizontal laundry drain to 3" and just bring the ground floor kitchen sink in the end instead of under it? See my drawing below. red is 3", green is 2"
Close. Vent the laundry standpipe at least 4 inches after the U of the p-trap but before the pipe turns down. So you will need only two basement vents for these: one for the lavatory, as you drew, and one for the laundry standpipe.
The stuff from ground floor must be vented upstairs, and presumably they are already vented.
90 bend at the lower right corner is long sweep.
Good point, I forgot that the UPC requires that, any horizontal portion of the tub fixture drain after the vent takeoff has to be 2".Robinhood, i noticed you said your bath tub had 1 1/2 drain that worked good but if it has a horizontal drain pipe it will require 2 inch other than trap and arm 1 1/2 " is fine
This is awkward, but...
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