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Normal Operation : A Hose "Kick" and reduced GENERAL. INSTRUCMONS flow signal that the tank is full. The OPW 61 -SO Overfill Prevention Valve is Close transport delivery value and drain hose designed for tight fill, gravity drop applications to into tank before disconnecting any hose fittingn help prevent accidental or intentional overfilling of Overfilled Tank: Failure of the hose to drain after underground storage tanks. It is installed in the . _ closing the delivery valve signals an overfilled UST fill pipe in place of a standard drop tube. ' tank. Do Not Disconnect any delivery hose fitting The main 61 SO valve normally closes when until the liquid level in the tank has been lowered i : to allow the hose to drain into the tank. Attention liquid level is within 8" of the top of the tank. ( The In the event you are splashed , remove all wetted actual shut off points are a function of where the ' clothing immediately. Do not go into an enclosed valve is positioned in the tank, which is area and stay away from ignition sources, determined by the length of the upper tube) . A . small bypass valve remains open to allow the IMPORTANT delivery hose to drain at 5 gallons per minute. If Determine if the underground storage tank is the delivery truck valve isnot closed after initial equipped with a ball float vent valve similar shutoff, the bypass valve will close when the liquid level is within 3" of the top of the tank. to the OPW 53VM , as illustrated in Figure 94, page 7. To permit proper operation of the IMPORTANT OPW 61 -SO, the ball float vent valve nipple RMUST NOT EXTEND more than 6" into the Read these assembly and installation tank. If it does, either remove the ball float instructions completely and carefully prior to vent valve or adjust the installation of the 61 starting. Check to make sure all parts have SO by adding the difference between 6" and been provided. Use on only the parts the actual installed length of the ball float supplied, substitution of parts may cause . vent valve nipple to the upper tube when product failure. marking the tube in STEP Z. In all cases, the shut-off point of the 61SO must be reached Failure to follow instructions may cause improper before the ball float reduces flow to ensure product operation or premature failure which may proper overfill valve operation. permit storage tank overfill. An overfilled storage tank may create hazardous conditions and/or environmental contamination. TOOLS NEEDED FOR INSTALLATION AND CAUTION ASSEMBLY; Do not remove elastic band from around float 1 . Drill until instructed to do so, as damage to valve 2, A sharp 1 /8" pilot drill bit may result. 3 . A sharp 5/16" drill bit 4 . Tape measure WARNING 5 Hacksaw or cutoff saw, fine tooth ; 24 Failure to properly connect delivery hose and teeth/inch elbow, and/or disconnecting a liquid filled 60 Fine half round file delivery hose or elbow will result in a hazardous 7 . ' Common bearing grease spill, which may result in personal injury, property g Screwdriver - flat blade damage , fire, explosion , and water and soil g• YT Wrench pollution . ♦ Make sure all connections, including the hose and elbow connections , between WARNING , - storage tank and transport are securely Using electrically operated equipment near coupled , gasoline or gasoline vapors may result in fire or ♦ Make sure the lip seal and/or all gaskets explosion , causing personal injury and property in the delivery elbow are properly in damage . Check to assure the working area is place to prevent spills , free from such hazards, and always use proper ♦ Do not operate with damaged or missing precautions . parts which prevent tight connections . 2