Installation
18│Page
-Natural Gas Supply Piping-
Maximum Delivery Capacity of Cubic Feet of Gas per Hour of IPS Pipe Carrying Natural Gas of 0.60 Specific Gravity
Based on Pressure Drop of 0.5” WC
Based on Energy Content of 1,000 BTU/Cubic Ft.: The water heater requires 140 Cubic Ft./hr for the 110 (T-KJr2)
models, 190 Cubic Ft./hr for the 310 (T-K4) models, and 199 Cubic Ft./hr for the 510 (T-D2) models.
Unit: Cubic Feet per Hour
Divide each appliance’s BTU requirement by 1,000BTU to get
the appliances Cubic Ft. requirement.
Take into account the distance the appliance is from the gas
meter, look in the above gas chart to properly size the line.
For sections of the gas line supplying gas to more than one
appliance (Ex: Point A to Point B), add up the cubic ft.
requirements of the appliances that are being supplied by that
section, and size to the farthest appliance.
For Example: The section from A to B supplies gas to the
furnace, range, and dryer. Adding up the BTU requirements
and dividing by 1,000 yields a cubic ft. requirement of 220
cubic ft. of gas. The farthest appliance is the range, which is 50
ft. away from the meter. Looking at the above chart, and
under the column of 50ft., Section A to B needs to be 1” in
order to supply 220 cubic ft.
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