Tomahawk Anti-Siphon Auto Vent, 1-1/2 in MNPT, ABS, Domestic

• For secondary venting only
• Each drainage system must have a main vent stack
• To be installed in a readily accessible location with free flow of air, never in a sealed wall cavity
• Sealing disc of auto vent must be located at least 6 in above the top of the trap are
• Two fixture may be drained by a common 1-1/2 in drain pipe
• Three or more fixture will require a 2 in drain pipe