How Many Septic Vents Do I Need?
How many vent pipes are required? One vent pipe. The vent system serving each building drain shall have not less than one vent pipe that extends to the outdoors. “How many vents do you need for 3 toilets? In a residence, a lavatory sink= 1.0 F.U., bathtub/shower= 2.0 F.U. and a toilet 1.6 gallons or…