The Allied Tube & Conduit PVC Conduit (vendor part 924814, Millennium part 525805) is a 4 in Schedule 40 gray section, 41 in long, sized for shorter runs, stub-ups and transitions where a full 10 or 20 ft stick is not practical. Crews use it at cabinet entries and riser connections on duct bank installations. Schedule 40 wall thickness balances cost and durability for standard buried and above-grade conduit runs. Millennium also stocks matching 4 in Schedule 40 elbows, couplers and end bells for the same run.