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E OPW Installation, Operation, and Maintenance Manual, Page 61 STEP 20: PREPARE FILL RISER FOR VALVE INSERTION IMPORTANT: Inspect the riser pipe for any foreign material. Over spray from tank relining or any internal burrs inside of pipe must be removed prior to installation. Failure to have an unobstructed riser pipe may prevent proper installation or operation of the valve. Thoroughly clean top of riser pipe. STEP 21: REMOVE ELASTIC BAND Remove the elastic batnd securing the float to the valve body. The float will move into an outward position. STEP 22: INSERT DROP TUBE Make sure the upper O -Ring gasket is under the flange of the inlet tube. Hold the float down against the valve body and slowly insert the drop tube overfill valve into the riser pipe. Do not force valve into the riser pipe. If any obstruction or foreign matter interferes with smooth insertion of the valve, the riser pipe must be cleared. WARNING Failure to follow the assembly and installation instructions or use of excessive force to insert the OPW 71SO will VOID THE WARRANTY! Figure 22 Difficulty in removing the existing fill tube (if there is one) means there may be an obstruction in the riser pipe. Look for burrs, deformations, excess tank lining material or other projections that may interfere with easy insertion of the OPW 7180. The 71 SO is designed for insertion into schedule 40 pipe. If schedule 80 pipe has been used for the riser, the 71SO cannot be installed. If seamed pipe has been used, the internal weld bead may interfere with the OPW 71SO and prevent installation. If the OPW 71SO won't slip in easily DON'T FORCE IT! Damage to the valve may result if excess force is used. Examine the riser pipe carefully; determine the nature of the obstruction, take appropriate steps to remove it. 11 Executive Order VR -1 02-K STEP 23: CHECK INSTALLATION Insert the drop tube all the way into the tank until the flange and gasket seat onto the top of the Face Seal Adaptor. The float will swing out into the operating position as it passes into the tank. Figure 23 Make sure that the float is aligned along the length of the tank The length of the tank can easily be determined by locating other manholes or pump boxes that are installed around other tank fittings. Look into the drop tube and align the deflector with the length of the tank. CAUTION: No obstruction in the tank can be within 14" from the center of the riser pipe or the valve may not operate properly (See Figure 24). STEP 24: ALIGN VALVE Install the OPW Jack Screw Kit and a 4" NPT nipple to lock the valve in place. Refer to the Installation Instructions supplied with the Jack Screw Kit Install the Rotatable Product Adaptor (Refer to Installation Instructions supplied with the Product Adaptor.) Make sure that the valve does not rotate while tightening the adaptor by observing the position of the deflector. The valve must remain aligned along the length of the tank as in Step 23. Repeat this step as necessary to assure proper valve alignment. OPW 71SO Overfill Prevention Valve Page 10