Please check my work

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Brooke Stabbert

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Hello,

I am plumbing in a small 3/4 bath with a lot if space limitations for running vents. the bath is in 1st floor with access from basement beneath. I wanted to run my layout past the experienced eyes here before I glue it all up and call for inspection.

Attached is the basic layout. The left side of the photo is a 2” shower drain with 2” dry vent (long sweep Y with the arm over 45 degrees) that then wet vents the 3” water closet line coming in from the right.

The 2” line running parallel to the WC line is from the kitchen and is vented there (ie not part of the wet vent group) and joins after the toilet wet vent.

The bath sink is dry vented separately and joins downstream.
 

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Brooke Stabbert

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The toilet is a wall hung unit, so the 3” line exits horizontally out the back of the toilet (which assume is considered part of the trap assembly) goes straight down 18” to a long sweep 90 to transition to horizontal. It goes straight 3’ to the 22.5 degree down joint (to keep the horizontal run above the drywall) to a long sweep 90 to the wet vent.

Is that 22.5 drop down before the 90 ok? I can do it as straight run without the 22, but this will be cleaner and easier to drywall the ceiling (instead of having the pipe half in and half out of the drywall).
 

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Brooke Stabbert

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In case anyone is worried about the hacked up joists in the pics, that wasn’t me!!! Previous plumbing work included hacking big notches in the bottom of the middle of the 2x8’s and even removing a full 16” in the middle of one of the joists. I got a note from my engineer to patch with 2x6’s, so those notches should not be an issue for inspection.
 

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