Mikey
Aspiring Old Fart, EE, computer & networking geek
In another thread, Terry once said:
"Fittings on their side (horizontal) and below grade should be wye fittings.
When rolling a vent off with a wye, most of the time, you would use a 45 and make sure that the rolled vent is above the flow line of the waste line.
For the toilet, that would be wye with 45 pointing the same direction as the pipe, and running toward the wall with the vent, using a long turn 90 at the wall when you go vertical."
I'm curious about the "most of the time" and "above the flow line". I've got a layout with an elevation problem -- I'm about 60' from the septic tank, and there's not enough room to roll the 3x3x2 wye up to 45 degrees for the vent without the vent rising above the surface of the slab. I've tried to simulate the flat vent with a test line, water, toilet paper, and various solids, and have (so far) not seen any hint of hangups, clogging, etc., as the flow passes the vent opening (flow goes from initially filling the pipe to below the flat Y opening), so I'm cautiously optimistic that I can get by without the full 45 degree roll (or any roll at all, for that matter). I can live with occasional snaking of the vent if need be. The vent rises at 1/4" per foot. What's the real-world wisdom/experience on this? Is there any other obscure fitting that might allow a lower overall profile and get the vent opening up higher?
(This fitting will be about 2 feet downstream from a Toto Drake feeding into a 4x3 reducing closet bend, fwiw).
"Fittings on their side (horizontal) and below grade should be wye fittings.
When rolling a vent off with a wye, most of the time, you would use a 45 and make sure that the rolled vent is above the flow line of the waste line.
For the toilet, that would be wye with 45 pointing the same direction as the pipe, and running toward the wall with the vent, using a long turn 90 at the wall when you go vertical."
I'm curious about the "most of the time" and "above the flow line". I've got a layout with an elevation problem -- I'm about 60' from the septic tank, and there's not enough room to roll the 3x3x2 wye up to 45 degrees for the vent without the vent rising above the surface of the slab. I've tried to simulate the flat vent with a test line, water, toilet paper, and various solids, and have (so far) not seen any hint of hangups, clogging, etc., as the flow passes the vent opening (flow goes from initially filling the pipe to below the flat Y opening), so I'm cautiously optimistic that I can get by without the full 45 degree roll (or any roll at all, for that matter). I can live with occasional snaking of the vent if need be. The vent rises at 1/4" per foot. What's the real-world wisdom/experience on this? Is there any other obscure fitting that might allow a lower overall profile and get the vent opening up higher?
(This fitting will be about 2 feet downstream from a Toto Drake feeding into a 4x3 reducing closet bend, fwiw).