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July
7, 1994
Overfill
Prevention Valve
UNIFORM
FIRE CODE – AUGUST, 1994 EDITION
ARTICLE
79 – FLAMMABLE
AND COMBUSTIBLE LIQUIDS
Division
l
APPENDIX
II-F
PROTECTED
ABOVEGROUND TANKS FOR MOTOR VEHICLE FUEL-DISPENSING STATIONS OUTSIDE BUILDINGS
Para.
5. INSTALLATION OF TANKS
(e)
Overfill
Prevention.
Protected
aboveground tanks shall not be filled in excess of
90
percent of their capacity. An overfill prevention system shall be provided for
each
tank.
During
tank filling operation the system shall
1)
Provide an independent means of
notifying the person filling the tank that the fluid level has reached 85
percent of tank capacity. This may be accomplished by one of the following:
A)
An alarm providing an audible or
visual signal.
B)
A tank level gage marked at 85 percent
of tank capacity.
C)
Other approved means.
2)
Automatically shut off the flow of fuel to
the tank when the quantity of liquid in the tank reaches 90 percent of tank
capacity. For rigid hose
fuel-delivery systems, an approved means shall be provided to empty the fill
hose into the tank after the automatic shutoff device is activated.
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