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Copper Tubes - Equivalent Length Pressure Loss in Fittings and Valves

Copper tube fittings and equivalent lengths - in feets of straight tube.

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Pressure loss as equivalent fittings length to add to actual length piping system:

Copper Tubes - Equivalent Length Pressure Loss in Fittings and Valves
Nominal Size
(in)
Equivalent Length (feet)
90o Elbow45o Elbow Line 90o TeeBranch 90o TeeBall ValveGate ValveButterfly ValveCheck Valve
3/8 0.5 1.5 1.5
1/2 1 0.5 2 2
5/8 1.5 0.5 2 2.5
3/4 2 0.5 3 3
1 2.5 1 4.5 0.5 4.5
1 1/4 3 1 5.5 0.5 0.5 5.5
1 1/2 4 1.5 7 0.5 0.5 6.5
2 5.5 2 9 0.5 0.5 0.5 7.5 9
2 1/2 7 2.5 12 0.5 1 10 11.5
3 9 3.5 15 1 1.5 15.5 14.5
3 1/2 9 3.5 14 1 2 12.5
4 12.5 5 21 1 2 16 18.5
  • 1 in (inch) = 25.4 mm
  • 1 ft (foot) = 0.3048 m
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