Hydronic Pipe Capacity: copper_type_L
Hydronic system pipe capacity data — maximum recommended flow rate (GPM), velocity, friction loss, and inside diameter for closed-loop HVAC hydronic systems by pipe material and nominal size
| pipe material | nominal size in | friction loss ft per 100ft (ft/100ft) | inside diameter in (in) | max recommended gpm (gpm) | notes | pipe roughness ft (ft) | velocity at max gpm fps (fps) |
|---|---|---|---|---|---|---|---|
| copper_type_L | 0.5 | 9.2 | 0.545 | 2 | Type L copper; max velocity 4-5 fps for closed loop; ASHRAE/ASPE guideline | 0.000005 | 4.9 |
| copper_type_L | 0.75 | 7.6 | 0.785 | 4 | 3/4-in type L copper; standard for terminal unit piping | 0.000005 | 5.2 |
| copper_type_L | 1 | 13.5 | 1.025 | 8 | 1-in type L copper; branch circuit range | 0.000005 | 9.6 |
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