Gas PipingQuestion 241 of 360
A building is served by an elevated-pressure (2 psi) gas system. What component is required near each appliance?
a.A second gas meter at every appliance
b.A sediment trap that also reduces pressure
c.Nothing extra; appliances run fine on 2 psi
d.A line pressure regulator to step the 2 psi down to the appliance operating pressure
Explanation
In a 2 psi (elevated-pressure) system, the smaller high-pressure piping must be stepped down by a line pressure regulator to the low pressure (inches of water column) each appliance needs. Without the regulator the appliance regulator would be overwhelmed and the burner would over-fire. The regulator is a separate device from the shutoff valve and sediment trap.
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