DuraVent 4PVP-12 Straight Length Pipe, 4 in OD, 12 in L, Galvalume/Stainless Steel, Black, Painted

Features fully unitized, twist-lock construction in 3 in Dia and 4 in Dia. Listed at 1 in clearance to combustibles in the USA and Canada. It can be used in both vertical and horizontal installations. Stainless steel welded seam inner wall, combined with a galvalume welded seam outer wall. Pipe OD is diameter plus 5/8 in. Galvalume or painted black outer finish. To calculate installed length, subtract 1-1/2 in from each length of pipe.