Hart & Cooley - Type B gas vent pipes and fittings are intended for neutral or negative draft applications. It is designed for vertical installations (including laterals) but may be used for horizontal applications with a draft-inducing fan located such that all indoor portions of the vent are under negative pressure.

The materials in this B-Vent have been selected to provide maximum resistance to corrosion and heat. However, their use with temperatures exceeding 550° F or in highly corrosive atmospheres, such as chlorinated hydrocarbons (i.e., refrigerants, drycleaning fluids, degreasers, paint removers, etc.), may substantially reduce their life expectancy.

• UL listed to Standard 441 for use with listed gas-fired appliances that have been certified for use with Type B gas vents