SELKIRK 104081 UNIVERSAL MALE ADAPTER FOR GAS VENT, TYP

SELKIRK 104081 - UNIVERSAL MALE ADAPTER FOR GAS VENT, TYPE B, 4-IN. - 4", 4RV-UAM, UNIVERSAL MALE ADAPTER, FOR ROUND TYPE B GAS VENT, ALLOWS METALBESTOS B-VENT CONNECTORS TO BE USED IN CONJUNCTION WITH OTHER BRANDS OF EXISTING VENT, USED TO ADAPT TO METALBESTOS PIPE TOWARD TERMINATION. ROUND GAS VENT DOUBLE WALL CONSTRUTION WITH IT'S BUILT-IN AIR SPACE, PROVIDES PERMANENT INSULATION AND KEEPS THE INNER PIPE HOT AND OUTER RELATIVELY COOL ALLOWS B-VENT CONNECTORS TO BE USED IN CONJUNCTION WITH OTHER BRANDS OF EXISTING VENT MALE ADAPTER USED TO ADOPT PIPE TOWARD TERMINATION UNDERWRITERS LABOTORIES UL 441 AND NATIONAL FIRE PROTECTION AGENCY NFPA 54 AND NFPA 211 VENT - EQUAL TO 678516