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a 4 e; The OPW 67 -SO Overfill Prevention Valve is designed for fight fill, gcavity drop applications to help prevent accidental or intentional overfilling of underground storage tanks. It is installed in the . UST fill pipe in place of a standard drop tube.' The main 61 SO valve normally closes when liquid level is within 8" of the top of the tank. (The actual shut off points are a function of where the valve is positioned in the tank, which is determined by the length of the upper tube). A . small bypass valve remains open to allow the delivery hose to drain at 5 gallons per minute. If the del'n►ery truck valve is not closed after initial shut off, the bypass valve will close when the liquid level is within 3" of the top of the tank. IMPORTANT Read these assembly and installation instructions completely and carefully prior to starting. Check to make sure all parts have been provided. Use on 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. OAUTION 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. 1 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. 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. Attention: In the event you are splashed, remove all wetted clothing immediately. Do not go into an enclosed area and stay away from ignition sources. IMPORTANT Determine if the underground storage tank is equipped with a ball float vent valve similar to the OPW 53VM, as illustrated in Figure 74, page 7. To permit proper operation of the OPW 61 -SO, the ball float vent valve nipple MUST NOT EXTEND more than ti" into the tank. If it does, either remove the ball float vent valve or adjust the installation of the 61 - SO by adding the difference between 6"and the actual installed length of the ball float vent valve nipple to the upper tube when marking the tube in STEP 2. In all cases, the shut-off point of the 61S0 must be reached before the ball float reduces flow to ensure proper overfill valve operation. TOOLS NEEDED FOR INSTALLATION AND ASSEMBLY: 1. Drill 2. A sharp 1 /8" pilot drill bit 3. A sharp 5/16" drill bit 4. Tape measure 5. Hacksaw or cut off saw, fine tooth; 24 teethtnch 6. Fine half round file 7. `Common bearing grease 8. Screwdriver -flat blade 8. '/Z' Wrench ]p(ARNING . - Using electrically operated equipment near gasoline or gasoline uapors 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.