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GENERAL INSTRUCTIONS Overfilled Tank : Failure of the hose to drain after closing the delivery valve signals an overfilled tank . The OPW 71 SO Overfill Prevention Valve is Do Not Disconnect any delivery hose fitting until the designed for tight fill , gravity drop applications to liquid level in the tank has been lowered to allow the help prevent accidental or intentional overfilling of hose to drain into the tank . underground storage tanks . It is installed in the UST drop tube in place of a standard drop tube . WARNING The main 71 SO valve closes when liquid level is at In the event you are splashed with fuel remove wet 95% of the top of the tank . A small bypass valve clothing immediately . Skin contact with gasoline can remains open to allow the delivery hose to drain at cause chemical burns and may result in inhalation of 3-5 gallons per minute . If the delivery truck valve is vapors that may be fatal . Never go inside confined not closed after initial shut-off, the bypass valve will areas after being splashed and never go near close and will restrict all fuel delivery . ignition sources . The 71 SO models of the 71 SO are designed to be IMPORTANT installed with the following OPW products : Face Seal Determine if the underground storage tank is Adaptor, OPW Spill Container or Multkport, Jack equipped with a ball float vent valve , as Screw Kit, Rotatable Product Adaptor, and Product illustrated in Figure 24. In all systems , the shut- Cap . off point of the 71 SO must be reached before the ball float reduces flow to ensure proper overfill IMPORTANT valve operation . Read these assembly and installation instructions completely and carefully prior to starting . Check to make sure all parts have been provided . Use only TOOLS NEEDED FOR INSTALLATION AND the parts supplied ; substitution of parts may cause ASSEMBLY : product failure . 1 . 71SO-TOOL or 71SO-TOOLC ( includes the following ) Failure to follow instructions may cause improper a . Sharp 3/16" drill bit with stop product operation or premature failure which may b . Punch permit storage tank overfill . An overfilled storage 2 . Drill tank may create hazardous conditions and/or 3 . Hammer environmental contamination . 4 . Tape measure 5 . Hacksaw or cut-off saw , fine tooth ; 24 teeth/inch CAUTION 6 . Fine half round file Do not remove elastic band from around float until 7 . Screwdriver - Phillips blade instructed to do so , as damage to valve may result . 8 . Fine grit sandpaper / steel wool 9 . Grease , black moly WARNING % Torque Wrench Failure to properly connect delivery hose and elbow, 11 . Band clamp (3-3/4" diameter minimum) and/or disconnecting a liquid filled delivery hose or elbow will result in a hazardous spill , which may WARNING result in personal injury , property damage , fire , Using electrically operated equipment near gasoline explosion , and water and soil pollution . or gasoline vapors may result in fire or explosion , * Make sure all connections , including the hose causing personal injury and property damage . and elbow connections , between storage tank Check to assure the working area is free from such and transport are securely coupled . hazards , and always use proper precautions . * Make sure the lip seal and/or all gaskets in the delivery elbow are properly in place to prevent spills . IMPORTANT : The figures in this installation and * Do not operate with damaged or missing parts , maintenance instruction may contain vapor recovery which prevent tight connections . equipment ( including model numbers) that is not certified by the California Air Resources Board Normal Operation : A Hose " Kick" and reduced flow (CARB ) for a specific Phase I Vapor Recovery signal that the tank is full . Close transport delivery System . Please refer to Exhibit 1 of the appropriate valve and drain hose into tank before disconnecting CARB Phase I Executive Order for a list of certified any hose fitting . Phase I Vapor Recovery System Equipment. 62