These adapters are designed with minimal flow restriction and
recommended for use on the outlet of the LP-Gas delivery truck filler
hose. If the controlled bleed off of the connection indicates the filler
valve on the tank being filled has failed to close, the hose adapter
should be left in place on the filler valve and disconnection should
be made at the regular filler hose coupling. (Repair of the filler valve
must be made as soon as possible). An integral check valve in these
adapters helps prevent further loss of product. The standard filler valve
cap should be attached to these adapters when left on the container.