orcas
New Member
It seems to me that each profession develops standards in isolation from the others. My dilemma is fitting a shower drain between floors with 12 inch engineered wood I joists. While I can more or less have my merry way cutting holes in theI joist web, cutting the flange is out of bounds, leaving about 9 inches of vertical play. The 2 inch shower trap takes about 7 inches itself and if I put a 2 x 1 1/2 x 2 wye on the drain leg I've used all 9 inches.
From what I've read, a vent line must tie into the drain line above its midpoint, if I camber the y over 45 degrees I'm still about 9 inches tall. Also I understand that a vent cannot run horizontal until it's 6 inch above the rim of the drain it serves. With these limitations, I don't see how I can get the vent line anywhere without cutting the flange (the vent extension out of the wye eating up vertical rise). Even if I cut the flange, at 45 degrees I can't go far without penetrating the floor.
This drain is in a 36" x 60" shower, I've got the drain pushed within 6 inches of a wall and still can't get the vent to the wall and stay at 45 degrees. Neither the joist nor shower dimension s are that unusual, how is it done? Can I run a vent line at a 1/4 to 12 slope (like a drain line) below the rim and be ok?
Thanks for what help you can offer.
From what I've read, a vent line must tie into the drain line above its midpoint, if I camber the y over 45 degrees I'm still about 9 inches tall. Also I understand that a vent cannot run horizontal until it's 6 inch above the rim of the drain it serves. With these limitations, I don't see how I can get the vent line anywhere without cutting the flange (the vent extension out of the wye eating up vertical rise). Even if I cut the flange, at 45 degrees I can't go far without penetrating the floor.
This drain is in a 36" x 60" shower, I've got the drain pushed within 6 inches of a wall and still can't get the vent to the wall and stay at 45 degrees. Neither the joist nor shower dimension s are that unusual, how is it done? Can I run a vent line at a 1/4 to 12 slope (like a drain line) below the rim and be ok?
Thanks for what help you can offer.