NIBCO 5801-7 ABS Pipe Fitting, Adapter, Schedule 40, 1-1/2" Hub x 1-1/2" Slip Joint Adapter for connecting pipes or fittings of different types Hub opening on one end and slip joint connection on the other for connecting two unthreaded pipes ABS-DWV for chemical and corrosion resistance, performance under wide temperature ranges, and light weight for quick assembly Smooth interior finish for reduced friction and material buildup Meets specifications ASTM D2661 and D3311 for quality assurance