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How to determine what size pipe you are looking at
The following is a simple way to configure pipe size.
- Wrap a piece of string around the fully exposed pipe in question one time.
- Measure the length it takes to wrap around the pipe once.
- Match your measurement with the lengths listed below to get a pipe size.
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Nominal Pipe Size |
Approximate String Length in Inches |
Copper Pipe |
Galvanized |
PVC Pipe |
1/2" |
2" |
2 5/8" |
2 5/8" |
5/8" |
2 3/8" |
na |
na |
3/4" |
2 3/4" |
3 5/16" |
3 5/16" |
1" |
3 1/2" |
4 1/8" |
4 1/8" |
1 1/4" |
4 5/16" |
5 3/16" |
5 3/16" |
1 1/2" |
5 1/8" |
6" |
6" |
2" |
6 3/4" |
7 7/16" |
7 7/16" |
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