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Pipe Table 3: Required Flow Rates to Achieve 0.6 m/sec ( 2 ft/sec ) - SDR 11 Pipe*
Nominal
Diameter
( in. (mm) )
SDR 11
Flow Rate
( l/min )
SCH 40
FlowRate
(gpm)
SDR 17, IPS
Flow Rate
(gpm)
SDR-13.5
Flow Rate
(gpm)
3/4 ( 20 mm )
15.1
12.5
--
--
1 ( 20 mm )
22.7
20.4
--
17.0
1 1/4 ( 32 mm )
34.1
35.2
--
25.4
1 1/2 ( 37.5 mm )
45.4
48.1
52.2
35.6
2 (50 mm )
68.1
79.1
81.4
60.9
3 ( 75 mm )
151.4
--
--
--
* Adapted from
Closed-Loop/Ground-Source Heat Pump Systems Installation Guide. NRECA Research Project 86-1.
Oklahoma State University. 1988.
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