Approved Vendor Pipe: Black Steel, 4 in Nominal Pipe Size, 5 ft Lg, Unthreaded, Schedule 40, Welded Model: 591-600LS

Approved Vendor Pipe: Black Steel, 4 in Nominal Pipe Size, 10 ft Lg, Threaded On Both Ends, Schedule 40, Welded Model: 591-1200

JME 4 in. Large Diameter Carbon Steel Pipe Nipples - BN-4X48

Approved Vendor Pipe: 304 Stainless Steel, 4 in Nominal Pipe Size, 10 ft Overall Lg, Unthreaded, Schedule 40, Welded Model: T4PPL10WD

OPW 4 in. Slotted PVC Pipe - 61SPVC4020

Cantex PVC Conduit: Schedule 40, 4 in Trade Size, 10 ft Nominal Lg Model: A52EA12