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  • 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" above the top of the trap arm
  • Two fixtures may be drained by a common 1-1/2" drain pipe. Three or more fixtures will require a 2" drain pipe
  • ABS material
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