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You are here: Home > Sprinkler School™ > Sprinkler System Basics > Sprinkler System Design and Installation > How To Determine What Pipe You Already Have
How To Determine What Pipe You Already Have

How To Determine What Pipe You Already Have

Sprinkler System And Irrigation Basics

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The following is a simple way to configure pipe size.

  1. Wrap a piece of string around the fully exposed pipe in question one time.
  2. Measure the length it takes to wrap around the pipe once.
  3. Match your measurement with the lengths listed below to get a pipe size.
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"
- The Do-It-Yourself Sprinkler Store -
 
   
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