ABS fitting inside concrete footing?
-toilet backs up to an exterior wall
My vent stack/end-of-line clean-out will come up through the footing/slab. In a typical above-grade install, the closet bend would point back to the wall and T into the stack, like this-
But how do I accomdate the requirement for a 2"-oversize sleeve in the footing penetration, if I've got a fitting buried in the footing? Is this a case where a horizontal vent is permitted due to structural/grade restrictions? like this-
Abs fitting inside concrete
You first picture is correct !
You just put a 3" x 2" reducer bushing into the top of your clean out tee and
extend the 2" vent up from there, also you get foam wrap and make 3 or 4
turns around the abs pipe and fittings where ever they are buried or cross
though the concrete footing and slab !
This gives room for the abs and concrete to slide without breaking the abs
like in thermal expansion of the abs when you run hot water though it !
This go's for all abs concrete penetrations