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Thanks for the responses! jadnashua - you're right. I would be wet venting the washing machine. I can run a separate vent for the WM that joins the VTR 6" above the flood rim of the kitchen sink. HJ - my drawing is poor; all the inlets are san-tees. Thanks!

Thanks for your response, HJ! I've attached a diagram of the project; I appreciate any guidance you may have on where to make transitions in the area shown in green. This location is downstream of the bathroom stack, which has a 4" vent all the way to the roof, so the 1 1/2" vent for this...

Thanks to everyone who contributes to this awesome resource! I'm rebuilding a rotten 2" cast iron kitchen waste stack. It was vented to the roof by a 1 1/2" lead pipe, but everything from the sink trap down to the building main needs replacement. It connected to the building main (4" cast...

First, thanks to everyone who contributes to this awesome resource! I'm rebuilding a very old 2" cast iron kitchen waste stack that literally disintegrated. It was vented to the roof by a 1 1/2" lead pipe. Everything below the sink trap down to the basement floor is rotten and needs to be...

Lightwave, Thanks very much for your input. Option #2, placing the plenum inside the joist bay and connecting the ducts to the underside, was my next option. An HVAC tech is coming today to evaluate my project. Thanks again!

Hello Everyone, I am upgrading my 2-ton HVAC system, installing a new A/C condenser and coil, but keeping the existing furnace and air handler. All are made by Rheem/Ruud. My furnace / air handler is in my basement in an updraft configuration. The basement ceiling is low (about 6 ft.). In...