Quick view Haviland 4" HDPE Triplewall Perforated Septic Pipe 3 Hole Compare $0.00 Triplewall pipe is a three layer high density polyethylene sewer & drain pipe. Consisting of a white exterior and black interior. Conforms to ASTM F810 specifications Joining System: Welded... Add to Wish List Add to My Wish List Create New Wish List