1" 3-way Elbow PVC Fitting Connector DO NOT use these fittings for plumbing projects. The 3 way L PVC pipe fitting also known as a 90 degree side outlet ell or corner fitting is commonly used to build a box or cube out of PVC pipe. It is also useful to make the ridge ends on PVC greenhouses or small PVC buildings. All three 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.