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Their’s both a UL and Canadian UL version for a ffirestop between floors. The annular space (distance from pipe to opening) is 3/8 to 3/4. I have already ran my ABS DWV with 0 annular space. How do I increase it to Standard without butchering my pipe runs? Is there any tool that can cut a...

No new vent needs to be ran. You can transform your drains into a WET VENT for your new bathroom: 1. Cut out the 90 from the stack and cut your vent and kitchen drain 2. Use 4x3x4" ABS Cleanout Tee with plug 3. Use a 3x2 ABS flush bushing for top of cleanout Tee 4. Use a 2x2x2 ABS wye 5. Use...

His friend of a friend certainly knows better...than you. Transition glue is perfectly legal in Canada, according to 7.2.5.11 of the Ontario Building Code: