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Hi, I'm going to be installing a Mainline backwater valve, and the instructions say I need at least 2% grade. I over analyze things... so does that mean the inlet pipe and outlet pipe have to have at least 2% grade, and the backwate valve should be level? The outlet pipe is already 3/4"...

Hi, I'm going to be joining some ABS drain/waste pipes together under my basement floor, and the bottom 1/4 of the pipe will be in water. The water table is still a little high from some recent rains. How sensitive is the ABS cement to water? I'm going to try to lift the ends up, apply the...

Hi, I'm currently redoing a lot of the plumbing in my basement... Its a home built in 1960, in Ottawa, Canada. I'm adding two bathrooms. There are two floor drains in my basement. One 2" drain near all the old laundry fixtures. Its a normal drain (2" drain with a trap and a trap arm that...

Hi, I’m adding new bathroom in my basement and I’m moving a lot of the existing plumbing around to make room. All of the plumbing for the new bathroom is not relevant to this post (for now). It will tie into the main pipe further downstream, and I’ll be putting a new vent through the...

Hi, I've been reading threads on this site for a few months now and must say, this forum is an amazing source of knowledge! Now on my my project... I'm starting a renovation and will be installing a new main floor bathroom (toilet and sink) and a new full basement bathroom (tub, shower...