Schedule 40 PVC Union Slip x Slip
Schedule 40 PVC Union fitting is like a coupler that can be taken apart. The union fitting has slip connections for the PVC pipe and a threaded "union" joint making it possible to separate the pipe sections at this connection. Union joint has an EPDM seal for leak-proof connection.
Selecting the correct size fittings to match your PVC pipe can be confusing if you do not already know what size PVC pipe you have. All plumbing grade PVC should have size and rating information imprinted on the outside of the pipe. PVC pipe is named for the inside diameter, commonly referred to as "a nominal size". If not able to locate this information then simply measuring the inside or outside diameter will help you determine the correct pipe size using the chart below.
PVC Pipe Size Table
| Nominal PVC Pipe Size | 1/2" | 3/4" | 1" | 1 1/4" | 1 1/2" | 2" |
| Average Inside Diameter | 0.622" | 0.824" | 1.049" | 1.380" | 1.610" | 2.047" |
| Actual Outside Diameter | 0.840" | 1.050" | 1.345" | 1.660" | 1.900" | 2.375" |
Once you determine your PVC pipe size then fitting selection is easy - just match the nominal pipe size to the corresponding fitting size. Example: If your pipe measures 0.824" ID (inside diameter) or 1.050" OD (outside diameter), which is 3/4" PVC pipe, you will select 3/4" PVC fitting.
