SELKIRK 104082 GAS VENT PIPE, ROUND, TYPE B, ADJUSTABLE

SELKIRK 104082 - GAS VENT PIPE, ROUND, TYPE B, ADJUSTABLE, 4 TO 12-IN. - 4" TO 12", ADJUSTABLE PIPE, ROUND TYPE B GAS VENT. 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 ROUND VENT PIPE AND FITTINGS ARE DESIGNED FOR USE ON APPROVED GAS APPLIANCES IN RESIDENTIAL AND LIGHT COMMERICIAL APPLICATIONS YOU NO LONGER HAVE TO USE SHEET METAL SCREWS TO SECURE PIPE CONNECTIONS IF LOCAL CODES REQUIRE YOU TO. JUST PRESS THE "LOCKTAB" AND YOU ARE DONE. UNDERWRITERS LABOTORIES UL 441 AND NATIONAL FIRE PROTECTION AGENCY NFPA 54 AND NFPA 211 VENTING GAS FIRED APPLIANCES, WATE - EQUAL TO 693804