Water Pipe Sizing Chart
Pipe Size
GPM
1/2"
Up to 1.5
3/4'
2 - 3.5
1"
4 - 7
1 1/4"
8 - 14
1 1/2"
15 - 22
2"
23 - 40
2 1/2"
41 - 70
3"
71 - 120
4"
121 - 250
5"
251 - 450
6"
451 - 700
8"
701 - 1200
Article ID: 661
Last updated: 14 Dec, 2020
Revision: 1
HVAC Information -> Water Pipe Sizing Chart
https://ghac.makekb.com/entry/661/