Meets specifications ASTM D2466 and D1784 for quality assurance NIBCO® 1-1/4 MIP x 1-1/2 Socket Sch 40 PVC Adapter at Spears 435 Series PVC Pipe Fitting, Adapter, Schedule 40, White, 2" So The NIBCO PVC Schedule 40 female adapter features a female socket x female NPT threaded connection and is used to adapt a solvent weld connection to a threaded connection Smooth interior finish for reduced friction and material buildup Specially Reinforced PVC Schedule 40 Female Adapter The NIBCO 435 schedule 40 adapter pipe fitting is made of PVC and has a slip connection and a female National Pipe Taper (NPT) threaded connection PVC for corrosion resistance, high strength, and less weight than fittings made from metal