JeffeVerde
Member
How do vent lines get run under a slab? It's my understanding that a vent has to slope a minimum of 45º until it's 6" above the flood line, but I'm not sure how to achieve that with underslab lines.
I'm planning a large walk-in shower, and the wall I'll vent up is the opposite direction from the waste line. The depth of the main waste line (2' below top of slab) doesn't allow for a 45º run back to the venting wall, and the only way to route the waste under the vent wall would be to make a 180º loop from the shower drain to the wall, and back to the main waste in the middle of the room. The shower drain is 2' in from the vent wall, and the main waste is 2' in the opposite direction. I *think* I've got enough rise/run that I could rotate the vent wye up and put a 1/6-bend at the vent wall.
I'm planning a large walk-in shower, and the wall I'll vent up is the opposite direction from the waste line. The depth of the main waste line (2' below top of slab) doesn't allow for a 45º run back to the venting wall, and the only way to route the waste under the vent wall would be to make a 180º loop from the shower drain to the wall, and back to the main waste in the middle of the room. The shower drain is 2' in from the vent wall, and the main waste is 2' in the opposite direction. I *think* I've got enough rise/run that I could rotate the vent wye up and put a 1/6-bend at the vent wall.
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