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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 Multi-port, 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 10. 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