Installing 2 baths one above the other

[Cpeters]

I'm looking for a diagram on the way two bathrooms should be vented and plumbed in new contruction.
I'm trying to eliminate as many vents as possible going through the roof. Basically 3 piece bathrooms.
I'll also have a washer i'd like to vent into this. The sink is on the far side of the house, so I'll probably need
a separate vent for that. One other question, are the tees reversed on the upper vent side?

 

[Reach4]

See #2 on https://terrylove.com/forums/index.php?threads/plumbing-venting-system.61651/
Vent tees are placed reversed from drain tees.

You can combine vents in the attic.

Also see http://www.co.lincoln.or.us/sites/d..._-_helpful_hints_residential_construction.pdf

 

[Sponsor]

 

[Cpeters]

See #2 on https://terrylove.com/forums/index.php?threads/plumbing-venting-system.61651/
Vent tees are placed reversed from drain tees.

You can combine vents in the attic.

Also see http://www.co.lincoln.or.us/sites/d..._-_helpful_hints_residential_construction.pdf

Thanks for the fast reply and the diagram. I understand sinks are 1 1/4"/ 1 1/2", showers are 2" and I was going to keep everything from
the toilet bends down 4". How about going up? Does Terry have a color coded pipe sizes for this chart? Thanks.

 

[Terry]

The toilets can be 3" and 2" vent.
Lavs 1.5"
Shower is 2" and 1.5" vent
Tub is 2" with a 1.5" trap and vent.

 

[Cpeters]

The toilets can be 3" and 2" vent.
Lavs 1.5"
Shower is 2" and 1.5" vent
Tub is 2" with a 1.5" trap and vent.

I have the rightmost vent stack as 3" and top toilet vent 3" and well as lower toilet vent 3".
The waste below toilets 4".
And as you said the tub/shower 2"
and sinks 1 1/2" into the 3" stacks.

Sound reasonable?

 

[Terry]

I have the rightmost vent stack as 3" and top toilet vent 3" and well as lower toilet vent 3".
The waste below toilets 4".
And as you said the tub/shower 2"
and sinks 1 1/2" into the 3" stacks.

Sound reasonable?

That sound plenty big enough.