Plumbing Schematic, How does this look?

[All Things Handy]

Hello,

Please see the attached pic. How does this look for IPC? Lots of obstructions in the basement and this is the best i could come up with. Ideally i would like to wet vent the lav, shower and WC and then connect the laundry after the group. If i dry vent everything individually (vents not shown in the diagram) does this look ok?

Also for the shower is it allowed to use a san-tee on its back for the dry vent?...just dont have the room for a wye and 45 in the joist bay. I am not sure if this is an issue with IPC in CT.

Thanks!!

 

[wwhitney]

The lav and the laundry always require dry venting. If you further dry vent the shower and the WC, each before the fixture drain joins another drain, and vertically (no horizontal dry vents under the floor), the drain connectivity is fine.

If you are able to reroute the laundry drain and keep it separate from the bathroom fixtures until downstream of the wye where the lav and shower join the WC, then that would let the lav wet vent the WC. Then if the length of the shower drain from the trap to the wye where it joins the lav is under 8' and the fall is under 2", that would further let the lav wet vent the shower. If it's close, you might be able to move that wye closer to the shower to get it within the distance/fall limits.

Cheers, Wayne

 

[Sponsor]

 

[Reach4]

Also for the shower is it allowed to use a san-tee on its back for the dry vent?...just dont have the room for a wye and 45 in the joist bay. I am not sure if this is an issue with IPC in CT.

https://codes.iccsafe.org/s/IPC2015_NY/chapter-7-sanitary-drainage/IPC2015-Ch07-Sec706.3 says "Sanitary tees may be used for horizontal drainage flow through the run of the tee where the branch of the tee is for venting only and is oriented within 45 degrees (0.79 rad) of the vertical. A sanitary tee can be installed on its back for venting applications in sanitary drainage."

 

[Jeff H Young]

if everything is dry vented you are fine