09-03 Wet vented or vent removed from floor drain

Question: 09-03Code Section: 7Date: 14 February 2009OBC 2006 Reference:,,

Question: Is this illustration acceptable to code?


1. Permitted – the floor drain served by the Laundry Tub. determines the minimum sizes wet vents, so the 4″ extending above grade with a cleanout where the wet vent continues is permitted although connected to the vertical section by a TY to serve the Laundry Tub’s continuous vent.

2. Not-Permitted – the floor drain served by the Kitchen Sink has a double offset. Change the Ty to a Wye and 450 to correct. Also a Cleanout is required.

3. Permitted – the floor drain connected to the branch downstream of the 3-inch stack.

Drain Interpretation: Approved at AMES 2009