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BRADFORD WHITE CORP.
Figure 14. Water Heater Piping — Multiple Heaters, Multiple Tanks.
Table 9. Water Flow Requirements — BMT2V.
gpm ft Temp Rise °F lpm m Temp Rise °C
Size S N H S N H S N H SNH SNH SNH
500 45 68 90 1.8 2.3 3.5 19 13 9 170 257 341 0.5 0.7 1.1 10 7 5
750 45 68 90 2.1 3.0 6.0 28 19 14 170 257 341 0.6 0.9 1.8 16 10 8
1000 45 68 90 2.3 3.6 6.1 38 25 19 170 257 341 0.6 1.1 1.9 21 14 10
1250 68 68 90 3.8 3.8 6.3 31 31 24 257 257 341 1.2 1.2 1.9 17 17 13
1500 68 68 90 3.9 3.9 6.5 38 38 28 257 257 341 1.2 1.2 2.0 21 21 16
1750 68 68 90 4.0 4.0 6.7 44 44 33 257 257 341 1.2 1.2 2.0 24 24 18
2000 112 112 112 10.0 10.0 10.0 30 30 30 424 424 424 3.0 3.0 3.0 17 17 17
NOTES: S = soft water (1 to 7.5 grains hardness).
N = normal water (7.6 to 17 grains hardness).
H = hard water (more than 17 grains hardness).
gpm = gallons per minute; lpm = liters per minute; ft = headloss in feet; m = headloss in meters.
Headloss is for heater's heat exchanger only.