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NOTE: For additional information, refer to the Defender Series° Overfill Prevention Valve <br />Installation Guide. <br />1. Determine Dimension A: <br />• Measure from bottom of the tank to the top of OPW face seal adaptor in the OPW spill <br />container. <br />2. Determine Dimension X: <br />• Measure required length for the upper drop tube from the non -flanged end. <br />• Remove the flanged top. <br />• Follow steps 3 to 16 in OPW 71SO Installation & Maintenance Instructions (H15524PA) <br />referenced in Executive Order VR -102 to cut the upper drop tube and install the OPW <br />inlet tube. <br />3 <br />Remove the flanged top of the upper drop tube. <br />OPERATIONAL INSPECTION <br />Use the FFS remote test tool to inspect the OPV. <br />PW <br />1. Assemble the remote test tool with enough extension sections to reach the OPV. <br />2. Insert the remote test tool into the drop tube. You should feel a "pull" when the magnets <br />are positioned correctly and attract. <br />3. Slowly raise the remote test tool about 1%" (38 mm). You should see the flapper move into <br />the flow path. If you see the flapper moving back and forth, the OPV is functioning normally. <br />14 <br />