PVC take-off per 45 degree fitting
Take-off is the distance from the center of the fitting to the bottom of the socket. The pipe bottoms out in the socket, so the tool subtracts the take-off twice.
| Pipe size | Take-off (in) | Decimal |
|---|---|---|
| 1/2" | 11/32 | 0.344 |
| 3/4" | 7/16 | 0.438 |
| 1" | 15/32 | 0.469 |
| 1 1/2" | 19/32 | 0.594 |
| 2" | 11/16 | 0.688 |
| 3" | 27/32 | 0.844 |
| 4" | 1 3/32 | 1.094 |
Source
Values are from Spears Manufacturing, Schedule 40 45 degree socket elbow, series 417, column J, with a tolerance of plus or minus 1/32 inch.
The 1-1/4 and 2-1/2 inch sizes are not listed. The printed catalog values for those two sizes break the pattern of the other sizes, so they look like typos. Type your own number for those sizes. Other makers differ, so measure the fitting in your hand when the job is costly.
Worked example
Rise 12 inches, roll 9 inches, 2 inch PVC. Travel is 21 3/16". Take-off is 11/16 inch per fitting. Cut length = 21.21 - 2 x 0.6875 = 19.84 inches, about 19 13/16".
Tips for PVC
- Dry fit the offset before you glue it.
- Mark the fitting and the pipe so the fitting stays at the right roll angle while the cement sets.
- The table is for 45 degree fittings only. For 22.5 or 60 degree fittings, type your own take-off.
Questions
What is the take-off of a 2 inch PVC 45 degree elbow?
11/16 inch (0.688), from Spears series 417.
Why does this tool not give 1-1/4 inch PVC?
The catalog values for 1-1/4 and 2-1/2 inch do not fit the pattern of the other sizes. They look like misprints, so the tool leaves them out.