1" 5-way Cross PVC Fitting Connector, 4 pack DO NOT use these fittings for plumbing projects. The 5 way PVC pipe fittings are commonly used to make center supports when covering a large area with a PVC structure. It is also useful to make bases for sprinklers, dog agility equipment and other stands. All five outlets are non-threaded sockets 1" Fittings fit on 1" Schedule 40 PVC or Furniture Grade PVC. Please check out ourPVC Sizing Guide (Specification Sheet)to make sure that you order the correct size PVC Fittings. PVC is NOT measured by the outside diameter, and doing so will result in receiving fittings that are too big for your pipe. Furniture Grade means this fitting has a non-marked, glossy finish.