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i ASSEMBLY INSTRUCTIONS Measuring IMPORTANT: Each of the numbered steps in the Stick installation instructions are designed as a CHECKLIST to insure proper installation and ::: _ trouble free operation of the OPW 61 -SO Overfill Prevention Valve. Read and follow these steps carefully , checking (B ) them off as you proceed. Yo Tank Riser (A ) Bottom Figure numbers correspond to step numbers for —mss easy reference. Pipe To Tank Top (I .D .) STEP 10 MEASURE Remove the tight fill cap and adaptor and the existing drop tube from the tank riser pipe. Measure the distance form the top of the riser pipe to the inside of the tank Dim. (A) using the measuring stick supplied . For new construction, Figure 1 take the measurement of dimension "A° after the pipe nipple has been installed in the spill container. Insert the measuring stick through the riser pipe and hook it under the inside of the tank in the lengthwise direction. Mark the stick at the top of the riser pipe. (For riser pipe configurations other than that shown , consult installation drawings or use other necessary means to measure dimension "A") . Using a tape measure, measure the distance from the top of the riser to the bottom of the tank (Dim. "B"), IMPORTANT. Inspect the riser pipe for any /Stick 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 and operation of the valve. The 61 S0 is designed to be installed into schedule 40 riser pipes. The 61 SO can not be installed intomschedule 80 riser pipes. be STEP 2 0 MARK THE TUBE )Align the end of the measuring "stick" with seam where upper tube and valve body meet as shown in Figure 2. Mark the tube at the mark on the Figure 2 measuring stick made in Step. 1 . 4