24 Pipe Length Black (4x6) Direct Vent (904B)

Designed for appliances tested and listed for direct vent and features a fully unitized twist-lock construction. Use of sealant is optional, unless specified by the appliance manufacturer. To calculate install length, subtract 1 1/2" for each joint. No beads or hems, allowing for a beautiful, sleek finish that looks great in any interior. All DirectVent Pro black pipe lengths feature exterior laser-welded seams. Direct vent appliances can easily be located next to a wall and vented through the wall without the expense of a chimney or vent them straight up the middle of the house. They're economical. This precision fitting pipe safely vents flue gases, while providing incoming combustion air through the space between its inner and outer walls. DirectVent Pro has an inner wall of .020" aluminum and an outer wall of .018" galvanized steel. The components twist lock together for quick, secure, fastener-free installations. This pipe has a 4" inner diameter, with a 6 5/8" outer diameter. Dir