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<br />ASSEMBLY INSTRUCTIONS <br /> <br />IMPORTANT: Each of the numbered steps in the <br />installation instructions are designed as a CHECK <br />LIST to ensure proper installation and trouble free <br />operation of the OPW 71SO Overfill Prevention <br />Valve. <br /> <br />Read and follow these steps carefully, checking <br />them off as you proceed. <br /> <br />Figure numbers correspond to step numbers for <br />easy reference. <br /> <br />STEP 1: MEASURE <br />Install the OPW Face Seal Adaptor and the OPW <br />Thread-on Spill Container on the Fill Riser (Refer to <br />the Installation Instructions Supplied with the Spill <br />Container). Insert the 71SO measuring stick <br />through the riser pipe and hook it under the inside of <br />the tank in the lengthwise direction. Mark the <br />measuring stick at the top of the Face Seal Adaptor <br />threads inside the base of the spill container bucket <br />just below the drain valve outlet window (See Figure <br />1 &1A). The top flange on the 71SO will rest on the <br />Face Seal Adaptor just below the drain valve outlet, <br />and be locked in place between the Face Seal <br />Adaptor and the 4" nipple that is installed in the spill <br />container with the Jack Screw Kit (See Figure 1A). <br />(For riser pipe configurations other than that shown, <br />consult installation drawings or use other necessary <br />means to measure Dimension “A”). <br /> <br />Using a tape measure, measure the distance from <br />the top of the Face Seal Adaptor in the spill <br />container to the bottom of the tank (Dim. “B”). <br /> <br />IMPORTANT: Inspect the riser pipe for any foreign <br />material. Over spray from tank relining or any <br />internal burrs inside of pipe must be removed prior <br />to installation. Failure to have an unobstructed riser <br />pipe may prevent proper installation and operation of <br />the valve. The 71SO is designed for installation into <br />schedule 40 riser pipes. The 71SO cannot be <br />installed into schedule 80 riser pipes. <br /> <br />STEP 2: MARK THE TUBE <br />Use the result from STEP 1 and HOW TO LOCATE <br />THE POSITION OF THE 71SO AT 95% TANK <br />CAPACITY to mark the upper tube. Measure the <br />distance from the seam where the upper tube and <br />valve body meet. For “C” measurements less than <br />or equal to 6-1/2” see Figure 2. For “C” <br />measurements greater than 6-1/2” use a tape <br />measure to mark the calculated upper tube length <br />onto the upper tube. <br /> 65 <br /> <br />Measuring Stick <br />Riser Pipe <br />with Face <br />Seal Adaptor (A) <br />To Tank <br />Top (I.D.)(B) <br />To Tank <br />Bottom <br />6-1/2” <br /> Figure 1 <br />Mark measuring <br />stick here for <br />Jack Screw <br />installation <br />(Top of Face <br />Seal Adaptor) 71SO <br />Face Seal <br />Adaptor <br />O-Ring Seal <br />OPW Spill <br />Container <br />Jack Screw <br />Kit <br />4” NPT <br />Nipple <br /> Figure 1A <br />Measuring Stick <br />Seam <br />Transfer Mark <br />From Stick to <br />Upper Tube <br />(Cut Line) <br /> Figure 2 (For “C” less than or equal to 6-1/2” <br />only)