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Air admittance valves

Rector Seal - The Name You've Trusted for Years RectorSeal, firestopping, metacaulk, fire stop, pipe thread sealants, air admittance valves, solvent cements, plumbing related products, plumbing, soldering, firestopping, firestop, air conditioning, refrigeration, heating, cleaners, degreasers, No. 5, T Plus 2, Tru-Blu, No. 5 Special, No. 5 Sub-Zero, No. 100 Virgin, No. See #1. An Overview of ProSet Penetration Systems Manufacturers of Firestopping Penetrations, Sleeving Systems, Speciality Drains and Air Admittance Valves all conforming rigorously to the National Plumbing Codes. See #2. 1: http://www.rectorseal.com [c926321] 2: http://www.prosetsystems.com [c1081081]