Pipe Size in Inches Volume per Foot
1/2" .0121 gal
3/4" .0251 gal
1" .0429 gal
1 1/4" .0655 gal
1 1/2" .0925 gal
2" .161 gal
2 1/2" .248 gal
3" .354 gal
3 1/2" .478 gal
4" .571 gal
5" .971 gal
6" 1.39 gal
8" 2.44 gal
10" 3.78 gal
12" 5.45 gal