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Pipe Table 3: (English) Required Flow Rates to Achieve 2 ft/sec - SDR 11 Pipe*
 
Nominal 
Diameter 
(in.)
SDR 11
Flow Rate
(gpm)
SCH 40
FlowRate
(gpm)
SDR 17, IPS
Flow Rate
(gpm)
SDR-13.5
Flow Rate
(gpm)
3/4
4
3.3
--
--
1 6
5.4
--
4.5
1 1/4
9
9.3
--
6.7
1 1/2
12
12.7
13.8
9.4
2
18
20.9
21.5
16.1
3
40
--
--
--
 
* Adapted from Closed-Loop/Ground-Source Heat Pump Systems Installation Guide.  NRECA Research Project 86-1.  Oklahoma State University.  1988.

 

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