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1216.6 Variable Gas Pressure
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Where the gas pressure exceeds
14 inches (3.5 kPa) or less than 6 inches (1.5 kPa) of
water column, or where diversity demand factors are used,
the design, pipe, sizing, materials, location, and use of such
systems first shall be approved by the Authority Having Jurisdiction.
Piping systems designed for pressures exceeding
the serving gas supplier's standard delivery pressure shall
have prior verification from the gas supplier of the availability
of the design pressure.
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