Earl
New Member
For an island sink waste and vent I'm using the recommended approach that is posted in many locations (see attached). However this application is not an island but rather against a pony wall in an open floor plan. The pony wall flows into the main load bearing post. Since I can't drill through it I'm routing down and around.
The plan shows Combo T-Wye's for the foot vent run into the vent return line. My application makes that somewhat difficult due to the height loss (the main line is ~30' from this drain). Due to geometry the foot vent is running perpendicular to the floor joists so that is already 5.5" below the floor. Just below the plywood floor, I'm using a 45 angle around a girder so the angle does help reduce the drop. (I thinking of adding another 22.5 angle to minimize further). To shorten it up can I use a san-T in place of the upper combo?
Since it is a vent do I need to use a long turn when routing back up through the wall after the post?
The plan shows Combo T-Wye's for the foot vent run into the vent return line. My application makes that somewhat difficult due to the height loss (the main line is ~30' from this drain). Due to geometry the foot vent is running perpendicular to the floor joists so that is already 5.5" below the floor. Just below the plywood floor, I'm using a 45 angle around a girder so the angle does help reduce the drop. (I thinking of adding another 22.5 angle to minimize further). To shorten it up can I use a san-T in place of the upper combo?
Since it is a vent do I need to use a long turn when routing back up through the wall after the post?
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