Extra Data: For secondary venting only. Each drainage system must have a main vent stack, Sealing disc of auto vent must be located at least 6" above the top of the trap arm., To be installed in a readily accesible location with free flow of air, never in a sealed wall cavity.
Extra Data: Corrosion Proof, Interlocking for stability and stacking, Soft rubber-like PVC is easy to trim and resists slipping on tile floors, Stiff polypropylene is drivable