I am installing a few floor drains for a building. I was surprised at a few of the rules and wanted to make sure that the info I had was "good practice". Note that these will be installed under a slab.
I took a diagram I found online and modified to roughly what I want to do. All lines are 3" except the one branch listed as 2".
Questions:
1. The diagram shows all the drains wyeing into the drain and then 1/8 turn to go perpendicular to the trunk. I am assuming installing a wye and running it 45 degrees from the trunk is also ok.
2. My notes say that as long as any drain branch is less than 15' away from the trunk, and as long as the trunk is under 100' long, additional venting is not needed.
3. Can anything be drained into the "vent" line from above the slab or even an upper floor?
4. If a guy put a P-trap ABOVE the floor on the cleanout stub, could it also operate as a drain (kind of like what I have shown for the 2" drain).
I took a diagram I found online and modified to roughly what I want to do. All lines are 3" except the one branch listed as 2".
Questions:
1. The diagram shows all the drains wyeing into the drain and then 1/8 turn to go perpendicular to the trunk. I am assuming installing a wye and running it 45 degrees from the trunk is also ok.
2. My notes say that as long as any drain branch is less than 15' away from the trunk, and as long as the trunk is under 100' long, additional venting is not needed.
3. Can anything be drained into the "vent" line from above the slab or even an upper floor?
4. If a guy put a P-trap ABOVE the floor on the cleanout stub, could it also operate as a drain (kind of like what I have shown for the 2" drain).