Vent sizing 2 bathrooms
I'm in California. I'm remodeling and will be building 2 bathrooms (a powder room and kids bath) right next to each other. Total of 2 toilets, 3 sink basins, and a tub/shower combo. Wondering what size vent I'll need if I can share them all through one stack up.
Also, can I drain this setup with one 3" drain down to the central or do I need a 4 inch?