Magic Vent is an air admittance valve used as part of the venting system in a drain, waste, and vent line. Protects the trap seal from siphonage caused by negative pressure in the system and to prevent leakage of sewer gas. Terminates the need for multiple pipe and roof stacks. Can be used with PVC and ABS. The vent is flexible and easy to use; saves time and money. Can be used in commercial and residential applications. The air admittance valve opens and closes depending on pipe pressure and easily balances air flow in and out without attracting dust and other blockages to the vent. Keeps out pests and insects. Magic Trap vent; air admittance valve system; comes with PVC adapter; eliminates roof penetrations. Recommended for PVC and ABS. FOR THE TRADESMAN: RectorSeal is recognized as a leading provider of quality solutions for the professional trades serving heating, ventilation, and air conditioning (HVAC/R), plumbing, electrical, and construction markets.