WAC 296-863-20035
Make sure liquefied petroleum gas
(LPG) fueled PITs meet these requirements.
You must:
• Use fuel containers that meet either of the following
minimum requirements:
– A U.S. Department of Transportation (USDOT) approved
container authorized for LP-gas service that has a minimum
service pressure of two hundred forty pounds per square inch
gage (psig);
OR
– A container Type 250 that has a design pressure of
312.5 psig.
• Make sure fuel containers do not use variable
liquid-level gages that require venting fuel to the
atmosphere.
• Make sure the fuel system of PITs used inside
buildings:
– Has an approved automatic shutoff valve, located ahead
of the inlet of the gas-air mixer, that will stop the flow of
fuel to the mixer if the engine stops;
AND
– Use not more than two LP-gas fuel containers.
• Make sure the fuel system of PITs used outdoors has an
approved automatic shutoff valve, located ahead of the inlet
of the gas-air mixer, that will stop the flow of fuel to the
mixer if both:
– The ignition is OFF.
– The engine is not running.
Note:
You may use an atmospheric type regulator (zero governor) as a shutoff valve if the PIT is used outdoors.