Plumbing design and venting questions

[Midwest DIY'r]

Installing a bathroom with a shower, floor drain and washer drain. The rough-in does not require an inspection but I still want to make sure it's correct to IPC. After hours of searching and reading I'm struggling to comprehend the venting to make this work correctly, please feel free to inject your feedback as necessary.

Purple = 3"
Black = 2"

 

[James Henry]

Your design looks inadequate but without a more detailed drawing, (wall locations, vent connection points, etc.) it's hard to submit any suggestions. Oh wait, I guess you did do that. Not that difficult to redesign.

 

[Sponsor]

 

[Reach4]

Is "sink" the bathroom sink, or is it the laundry sink for the washer? If bathroom, I think it is going to be an easy-enough change.

 

[Midwest DIY'r]

Is "sink" the bathroom sink, or is it the laundry sink for the washer? If bathroom, I think it is going to be an easy-enough change.

Sink is a regular sink, washer is for a future washer/dryer combo in case we decided to add it in the future. I made a couple edits to the design based on some videos and IPC reading, unknown if it's correct but I made an attempt.

 

[Reach4]

https://wabo.memberclicks.net/assets/pdfs/Plumbing_Venting_Brochure_2018.pdf

See drawing on page 12. See "emergency floor drain" references on page 13.

Red represents 2 inch from the lav santee to the shower drain. I am not sure if you must feed wet vent from lav into the shower drain from above, or if from the side is OK.

Washer trap and standpipe need to be 2 inch, but I think 1.5 is ok for the vent to that santee.

 

[GReynolds929]

Something like this might work also.

 

[Reach4]

Something like this might work also.

Even if I discount the emergency floor drain, that puts two sources upstream of the wet vent.