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Table 7: Maximum Capacity of Schedule 40 Pipe in CFH* For Gas Pressures of 0.5 psig or Less
Figure 27: Recommended Gas Piping
Table 8: Equivalent Lengths of Standard Pipe Fittings & Valves
B. Connect boiler gas valve to gas supply system.
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1. Use methods and materials in accordance with local
plumbing codes and requirements of gas supplier. In
absence of such requirements, follow National Fuel
Gas Code, NFPA 54/ANSI Z223.1.
2. Use thread (joint) compounds (pipe dope) resistant
to action of liquefi ed petroleum gas.
3. Install sediment trap, ground-joint union and manual
shut-off valve upstream of boiler gas control valve
and outside jacket. See Figure 27.
* 1 CFH of Natural Gas is approximately equal to 1 MBH; 1 CFH of LP is approximately equal to 2.5 MBH; con-
tact your gas supplier for the actual heating value of your gas.
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