The Waterway Union Assembly [Heat Jacket - Dual Barb] [Without Nut] (417-2150) is a replacement union, tailpiece, nut, or assembly used to create a serviceable connection in pool, spa, bath, or equipment plumbing. It is intended for applications where pumps, heaters, chlorinators, or manifolds may need to be removed without cutting rigid pipe.This Waterway Plastics part supports a cleaner repair because the union connection can be separated and reassembled when the correct gasket, O-ring, thread, and tailpiece style are matched. Key identifiers include Heat Jacket - Dual Barb, Without Nut. Confirming the exact part number helps avoid mismatched buttress threads, slip ends, barb ends, or tailpiece sizes. Use it when rebuilding equipment pads, replacing damaged union hardware, or restoring a leak-resistant connection around serviceable equipment. For best results, clean the mating surfaces during installation and replace related seals or gaskets whenever they show compression set, hardening, or visible damage. Part number 417-2150 should be used as the primary identifier when cross-checking compatibility. Creates a serviceable connection for pumps, heaters, or plumbing lines Match thread, tailpiece, gasket, O-ring, and pipe size before installation Helps simplify future maintenance and equipment removal Useful for leak repair, rebuilds, and equipment pad service work Built for pool and spa plumbing replacement applications