How much water is in a 100 foot by 1/2 inch copper tube?
How much water is in a 100 foot by 3/4 inch copper tube?
How much water is in a 100 foot by 1/4 inch copper tube?
OD ID Area cu-in cu-ft cu-ft
per ft per ft per 100 ft
0.500 0.469 0.173 2.071 0.001 0.120
0.750 0.719 0.406 4.869 0.003 0.282
0.250 0.219 0.038 0.451 0.000 0.026

Dear William -
Thanks for the chart. I appreciate all the work.
Does that mean 100 feet of 3/4 inch holds .282 gallons?
1/2 inch holds .120 gallons? 1/4 inch holds .026 gallons?
I expected 100 feet of pipe to hold so much more.
Harry