Nylon plumbing fittings are an economical alternative to more costly bronze or Marelon fittings.For above-the-waterline use only. We offer these fittings to fit pipe sizes from 1/4" up to 1 1/2" and hose from 1/2" up to 1 1/2"ID.Pipe sizes from 1/4" up to 1 1/2"Offered in sizes to fit hose from 1/2"ID up to 1 1/2"IDThreaded fittings are National PIpe Thread (NPT)Above-the-waterline use only