PVC plumbing fittings are an economical alternative to more costly bronze or Marelon fittings.Fittings like these PVC Close Nipples cost less than similar fittings made of Marelon or Bronze, but are for above-the-waterline use only.Sizes from 1/2", 3/4", 1", 1 1/4", 1 1/2"NPT threadsAbove-the-waterline use only