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B
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Based on energy content of 1,000 BTU/Cubic ft.: The water heater requires 140 Cubic ft./hr for the 110U (T-KJr2U)
models, 190 Cubic ft./hr for the 310U (T-K4U) models, and 199 Cubic ft./hr for the 510U (T-D2U) models.
Pipe size
Length
Diameter
10'
20'
30'
40'
50'
60'
70'
80'
90'
100'
125'
150'
200'
3/4"
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Unit: Cubic feet per hour
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Water
heater
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Gas meter
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A
B
C
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3/4" Pipe size
3D 0B!
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Gas sizing example
(Natural Gas)
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