Fig. 9: Pool Piping for Heat Pump Pool Heaters, Multiple, Primary/Secondary
BRANCH MAIN BRANCH MAIN BRANCH MAIN
15 GPM 2" 2" 15 GPM 2" 2" 15 GPM 2" 2"
30 2" 2" 30 2" 2-1/2" 30 2" 3"
45 2" 2" 45 2" 3" 45 2" 4"
60 2" 2-1/2" 60 2" 3" 60 2" 4"
80 2" 3" 80 2" 4" 80 2" 5"
*Sizing based on 10 ft/sec flow rates
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