Pipe Flashing
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      3. Pipe Flashing

      What classifies a Type-B construction for the 3 in. Plastic Adjustable Pipe Flashing with Hard Base and Rubber Collar?

      A B-vent gas fireplace is a type of natural draft system that uses a special pipe to carry combustion gases out of your home.

      Natural draft gas fireplaces do not have a sealed combustion chamber and rely on the natural buoyancy of heated air to vent combustion gases outside of your home. A B-vent gas fireplace is a type of natural draft system that uses a special pipe to carry combustion gases out of your home. Type B Gas Vents are approved by Underwriter’s Laboratories test UL441.