4BVAM M & G DuraVent Type B Gas Vent Male Adapter 4" Diameter

Use to connect existing M&G DuraVent Type B Gas Vent to a listed Type B Gas Vent system manufactured by other companies. Male adapter can also be used to attach to DuraFlex

Dura-Vents UL Listed Type B Gas Vent. It has a twist-lock design that is fast and easy to install or disassemble all with no fitting hassles. Dura-Vent Type B Gas Vent can be used to vent Category I gas appliances or whenever R-Vent is specified on the appliance label. It requires 1” clearance to combustible. The inner liner is 012in aluminum and the outer wall is premium grade 018in galvanized steel.