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4 .� �' <br />IMPORTANT: Each ofthe numbered steps in the <br />installation instructions are designed as a <br />CHECKLIST to insure proper installation and <br />trouble free operation ofthe OPW 61 -SO Ovefill <br />Prevention Valve. <br />Read and follow these steps carefu{ly, checidng <br />them off as you proceed. <br />Figure numbers correspond to step numbers for <br />easy reference. <br />STEP 10 MEASURE <br />Remove the tight fill cap and adaptor and the <br />existing drop tube from the tank riser pipe. <br />Measure the distance form the top ofthe riser <br />pipe to the inside of the tank Dim. (A) using the <br />measuring stick supplied. For new construction, <br />take the measurement of dimension "A" after the <br />pipe nipple has been installed in the spill <br />container. Insert the measuring stickthrough the <br />riser pipe and hook it under the inside ofthe tank <br />in the lengthwise direction. Mark the stick at the <br />top ofthe riser pipe. (For riser pipe <br />configurations other than that shown, consult <br />installation drawings or use other necessary <br />means to measure dimension "A"). <br />Using a tape measure, measure the distance <br />from the top ofthe riser to the bottom of the tank <br />(Dim. "B'�, <br />IMPORTANT: Inspect the riser pipe for any <br />foreign material. Over spray from tank relining or <br />any internal burrs inside of pipe must be <br />removed prior to installation. Failure to have an <br />unobstructed riser pipe may prevent proper <br />installation'and operation of the valve. The 6150 <br />is designed to be installed into schedule 40 riser <br />pipes. The 61S0 can not be installed into <br />schedule SO riser pipes. <br />STEP 2 0 MARK THE TUBE <br />Align the end ofthe measuring "stick" with seam <br />where upper tube and valve body meet as shown <br />in Figure 2. Markthe tube atthe mark on the <br />measuring stick made in Step. 1. <br />0 <br />Figure 1 <br />Measuring <br />Sick <br />(g) <br />To Tank <br />Riser.. <br />(A) Bottom <br />plp,� To Tank <br />Top (LD.) <br />Measuring <br />Stick <br />� Trant'er <br />Mark From <br />Stick to <br />` Upper Tube <br />(Cut Line) <br />Figure 2 <br />Seam <br />