If you need to replace components in your HVAC system, M&G DuraVent is a great way to go. Save on this DuraVent 4PVM-60 PelletVent Pipe, 4" x 60" (33160). Chat us up if you have questions about this part or the installation process. Features fully unitized, twist-lock construction in 3” and 4” diameters. Listed at 3” clearance to combustibles, in the USA. It can be used in both vertical and horizontal installations. Stainless steel wall, combined with a galvanized outer wall. Pipe OD is diameter plus 5⁄8”.