DuraVent Type B Gas Vent System Female Adaptor - 4" Length: This unit necessitates a venting pipe with a 4" inner diameter. This DuraVent Female Adaptor for Type-B Ventilation Systems connects DuraVent gas vent pipes to a variety of B-vent pipe brands. The Dura-Vent pipe system is designed to work with natural gas or propane Category I and draft hood equipped appliances, as well as appliances that have been tested and listed to use Type B gas vent for a variety of applications. You may use this adaptor to connect to the following brands: American Metal Products, Household Manufacturing, Hart & Cooley Manufacturing, Metal Fab Inc., White Metal Products, Air Jet, and Mitchell Metal Products. 6" high.

Allows Dura-Vent Type B Gas Vent to be connected below other brands of B-Vent Connects to the following brands: American Metal Products Household Manufacturing Hart & Cooley Manufacturing Metal Fab Inc. White Metal Products Air Jet Mitchell Metal Products