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LPG Gas Regulator (or Pressure Reducer)
Flow rate is extremely important in the operation of this connection. The pressure reducer can
activate if the cylinder valve opens quickly. When all appliances are turned off, the propane
regulator allows the pressure downstream of the propane regulator to equalize. During pressure
equalization, the propane regulator will allow normal gas flow through the system. The
equalization occurs about 5 seconds after opening and is completely unnoticeable in most cases.
If, however, there is an open appliance or a leak or open valve in the system, the regulator will
fail to balance and will block the propane regulator from reopening. The result of this blockage
would be a lower-than-normal flame or flame out due to lack of gas, a substantial reduction in
flame while another appliance is already on, or pilots that are difficult to light. If this occurs, the
following steps should eliminate the condition:
1. Close the propane cylinder valve;
2. Extinguish all flames;
3. Ensure that all gas appliances, including pilot lights, are turned off;
4. Slowly open the propane cylinder valve. Do not open suddenly;
5. Wait at least 15 seconds before lighting any appliance.
If difficulties persist, there may be a leak in the system. Close the propane cylinder valve and have
it inspected immediately by a qualified service technician.
LPG Gas Fill Valve
Propane Gas Fill Valve
Trailer is equipped with a propane tank filler valve called an “Acme Type I RV Fitting” (photo G-
1). The pivot nut is threaded and is designed for hand tightening only (photo G-2).
The valve has an internal spring module that allows gas to flow from the cylinder only when a
positive seal is established at the connection. The Acme outlet valve has a 1-5/16 ″ thread on the
outside and a left hand threaded female POL on the inside. This feature allows the connection of
a new Acme trailer connection without a key, or a standard left-handed POL fitting used for
propane tank filling.
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