New bath layout *update plan

[2020Bob]

this is a cabin in Maine, they follow UPC
Shower and bath 1.5"
lav 1 1/4"
The cabin sits 30" off the ground so access is ok.

A septic system is being installed
The toilet will connect to 4" vertical then to septic.
Thinking to run 2" wash into 4" vertical stack, can the other fixtures tye into the wash line?
Or should the connect another way.

This is my first stab at it, open to any input.

can tub just use an AAV
I think one vent can handle the shower lav and wash

 

[Reach4]

Shower must be 2 inch minimum. If wet venting from the lav, which is to your benefit, use 2 inch below the santee of the lav.

I am guessing "wash" is a standpipe for the washing machine. Insert that water downstream of the toilet to let you wet vent the toilet.

Lav and standpipe will need vents.

These are the highlights.

 

[Sponsor]

 

[2020Bob]

thanks
so one dry vent off the lav takes care of of everything except toilet?
Wat about the tub?
Just so you understand why i said shower was 1.5" I read it here

 

[Reach4]

OK. I think IPC wants 2 inch, and a lot of UPC plumbers recommend 2 inch for showers.

 

[2020Bob]

Update rev2
Run 2" off lav tying in Wash and vent

run shower into that

Run tub into end of 3" x 3" x 2" PVC DWV 90° Elbow

 

[Reach4]

You want to add the washing machine standpipe to your bathroom group? That is not one of the things that IPC allows as part of a bathroom group.

Run the drain for the laundry standpipe downstream of the toilet. That means between the toilet and the septic.

 

[2020Bob]

I was thinking of connecting that 2" pipe with lav shower and wash in vertical going down to sewer downstream of toilet, that work?

 

[Reach4]

I was thinking of connecting that 2" pipe with lav shower and wash in vertical going down to sewer downstream of toilet, that work?

Depends on what work means to you. Meet code? Suds disappear? NO but yes.