KitchenAid 720-0819 (LP) Manual page 7

Natural Gas:
Operating pressure: 4" (10.2 cm) WCP
Inlet (supply) pressure: 7" to 14" (17.8 cm to 35.5 cm) WCP
maximum.
Contact local gas supplier if you are not sure about the
inlet (supply) pressure.
Burner Requirements for High Altitude
Input ratings shown on the model/serial rating plate are for
elevations up to 2,000 ft (609.6 m), ratings are reduced at a
rate of 4% for each 1,000 ft (304.8 m) above sea level.
Orifice conversion is required. See "Assistance" section to
order.
Gas Supply Line Pressure Testing
Testing above 1/2 psi (3.5 kPa) or 14" (35.5 cm) WCP (gauge):
The grill and its individual shutoff valve must be
disconnected from the gas supply piping system during
any pressure testing of that system at test pressures
greater than 1/2 psi (3.5 kPa).
Testing below 1/2 psi (3.5 kPa) or 14" (35.5 cm) WCP (gauge) or
lower:
The grill must be isolated from the gas supply piping
system by closing its individual manual shutoff valve during
any pressure testing of the gas supply piping system at test
pressures equal to or less than 1/2 psi (3.5 kPa).
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