NIBCO 5803-2 ABS Pipe Fitting, Adapter, Schedule 40, 1-1/2" Spigot x 1-1/2" NPT Female Adapter for connecting pipes or fittings of different types Spigot on one end and female National Pipe Taper (NPT) threads on the other for connecting two pipes with different ends 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