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GENERAL INSTRUCTIONS The OPW 71 SO Overfill Prevention Valve is designed for tight fill, gravity drop applications to help prevent accidental or intentional overfilling of underground storage tanks. It is installed in the UST drop tube in place of a standard drop tube. The main 71 SO valve closes when liquid level is at 95% of the top of the tank. A small bypass valve remains open to allow the delivery hose to drain at 3-5 gallons per minute. If the delivery truck valve is not closed after initial shut-off, the bypass valve will close and will restrict all fuel delivery. The 71 SO models of the 71 SO are designed to be installed with the following OPW products: Face Seal Adaptor, OPW Spill Container or Multi -port, Jack Screw Kit, Rotatable Product Adaptor, and Product Cap. IMPORTANT Read these assembly and installation instructions completely and carefully prior to starting. Check to make sure all parts have been provided. Use only the parts supplied; substitution of parts may cause product failure. Failure to follow instructions may cause improper product operation or premature failure which may permit storage tank overfill. An overfilled storage tank may create hazardous conditions and/or environmental contamination. CAUTION Do not remove elastic band from around float until instructed to do so, as damage to valve may result. WARNING Failure to properly connect delivery hose and elbow, and/or disconnecting a liquid filled delivery hose or elbow will result in a hazardous spill, which may result in personal injury, property damage, fire, explosion, and water and soil pollution. Make sure all connections, including the hose and elbow connections, between storage tank and transport are securely coupled. Make sure the lip seal and/or all gaskets in the delivery elbow are properly in place to prevent spills. Do not operate with damaged or missing parts, which prevent tight connections. Normal Operation: A Hose "Kick" and reduced flow signal that the tank is full. Close transport delivery valve and drain hose into tank before disconnecting any hose fitting. 62 Overfilled Tank: Failure of the hose to drain after closing the delivery valve signals an overfilled tank. Do Not Disconnect any delivery hose fitting until the liquid level in the tank has been lowered to allow the hose to drain into the tank. WARNING In the event you are splashed with fuel remove wet clothing immediately. Skin contact with gasoline can cause chemical burns and may result in inhalation of vapors that may be fatal. Never go inside confined areas after being splashed and never go near ignition sources. IMPORTANT Determine if the underground storage tank is equipped with a ball float vent valve, as illustrated in Figure 24. In all systems, the shut- off point of the 71 SO must be reached before the ball float reduces flow to ensure proper overfill valve operation. TOOLS NEEDED FOR INSTALLATION AND ASSEMBLY: 1. 71 SO -TOOL or 71 SO-TOOLC (includes the following) a. Sharp 3/16" drill bit with stop b. Punch 2. Drill 3. Hammer 4. Tape measure 5. Hacksaw or cut-off saw, fine tooth; 24 teeth/inch 6. Fine half round file 7. Screwdriver - Phillips blade 8. Fine grit sandpaper / steel wool 9. Grease, black moly 10. Torque Wrench 11. Band clamp (3-3/4" diameter minimum) WARNING Using electrically operated equipment near gasoline or gasoline vapors may result in fire or explosion, causing personal injury and property damage. Check to assure the working area is free from such hazards, and always use proper precautions. IMPORTANT: The figures in this installation and maintenance instruction may contain vapor recovery equipment (including model numbers) that is not certified by the California Air Resources Board (CARB) for a specific Phase I Vapor Recovery System. Please refer to Exhibit 1 of the appropriate CARB Phase I Executive Order for a list of certified Phase I Vapor Recovery System Equipment.