Generac Power Systems PowerPact 6561 Installation Notes page 27

Gas Regulator Issues
 The Primary Regulator for the propane supply is NOT INCLUDED with the generator.
 Note: LP Pipe sizes given in the manual are using a second stage regulator.
 When sizing a secondary regulator for LP or High Pressure NatGas, be sure to note the Maximum
individual load capabilities which will be lower than the total capacity. This could impact generator
starting performance issues.
Second stage regulators function to further decrease pressure to a usable level for appliance demand. These
regulators work with the lower pressures delivered by first stage regulators and in turn, lower the pressure
even more so that the propane will adequately and safely supply the demand of the appliances
First Stage Propane Regulators
First stage regulators serve as a primary means for
pressure regulation in a two stage system. First stage
regulators are sometimes referred to as high pressure
regulators (although not true high pressure regulators)
because they do not reduce variable tank pressures to
appliance level pressure. They just lower the pressure
before it goes into the gas service line
Second Stage Propane Regulators
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