Butt Fusion is the earliest form of heat fusion pipe joining in the high density polyethylene (HDPE) industry. It involves simultaneously heating two segments of pipe or a segment of pipe and molded fitting until they reach a melting point where they can be joined together to form a permanent and continuous HDPE bond. When properly joined and cooled, the fusion joint is stronger than the individual parts. Butt fusion requires specialized tooling and is typically reserved for pipe sizes 2" and larger. We carry a limited quantity of butt fusion fittings and equipment, but have access to a complete line through our HDPE master distributor. Please call us for sizes 2" IPS through 24" DIPS.