Gallons and litres held by any length of pipe, from its inside diameter.
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Use the inside diameter. Nominal pipe size is only a label.
| Pipe | Inside diameter | Gallons per foot |
|---|---|---|
| 1/2" PEX | 0.475 in | 0.009 |
| 3/4" PEX | 0.671 in | 0.018 |
| 1" PEX | 0.862 in | 0.030 |
| 3/4" copper L | 0.785 in | 0.025 |
| 1" copper L | 1.025 in | 0.043 |
| 1-1/2" PVC 40 | 1.61 in | 0.106 |
| 2" PVC 40 | 2.067 in | 0.174 |
| 3" PVC 40 | 3.068 in | 0.384 |
| 4" PVC 40 | 4.026 in | 0.661 |
GPM from a bucket test or pipe velocity, and time to fill a tank
GPM from your fixtures and groundwater by ZIP, then gas BTU or electric kW, amps and breakers
GPM from a pit test or your basement, total head, horsepower from pump curves, basin size and backup power
Pipe sizes, fittings, codes, soldering techniques, and common repairs
Reference table showing maximum flow rate and recommended pipe size for PEX tubing
Reference sheet detailing gauge measurements and calibration procedures for PEX tools