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5) Dipstick number(X) =82" top of the Face Seal Adaptor in the spill container to the Tank diameter(Y) =92" bottom of the tank(Dim.'B"). (Y)-(X)=(Z) (92"-82"= 10") IMPORTANT:Inspect the riser pipe for any foreign ma- (Z)= 10" terial. Over spray from tank relining or any internal 6) (Z) -2"=C (10"-2"=8") burrs inside of pipe must be removed prior to installa- C=8" tion. Failure to have an unobstructed riser pipe may 7) Is 8" less than 6-1/2"? prevent proper installation and operation of the valve. The 71 SO is designed for installation into schedule 40 NO Measure the distance from the top of the FSA- riser pipes. The 71 SO cannot be installed into schedule g0 riser pipes. 400 Face Seal Adaptor installed on the riser pipe to the inside,top lip of the storage tank and ob- STEP 2: MARKTHE TUBE tain measurement(A). Use the result from Step 1 and HOW TO LOCATE THE POSITION OF THE 71 SO AT 95%TANK CAPACITY to Upper tube length =C+ (A) mark the upper tube. Measure the distance from the seam where the upper tube and valve body meet. Use For testable models only,ending in"T": Upper Tube a tape measure to mark the calculated upper tube Length=C+(A)- 1-1/2" length onto the upper tube. See Figure 2. ASSEMBLY INSTRUCTIONS Bung Mount rTapemeasure Manwaymount —Tape measure E � IMPORTANT: Each of the numbered steps in the instal- 5 Consult tank z manufacturer (A) (B) lation instructions are designed as a CHECK LIST to en- f for height of S To Tank To Tank Top(LD.) Bottom sure proper installation and trouble free operation of I the manway t (6"typical) I the OPW 71 SO Overfill Prevention Valve. To k (6) Top(I.D.) To Tank I {Read and follow these steps carefully,checking them Bottom off as you proceed. Figure numbers correspond to step numbers for easy Figure 1 reference. STEP 1: MEASURE Install the OPW Face Seal Adaptor and the OPW Thread- on Spill Container on the Fill Riser(Refer to the Installa- tion Instructions Supplied with the Spill Container). In- 4" NPT sert a tape measure through the riser pipe and hook it Nipple under the inside of the tank in the lengthwise direction. ' I Measure the distance from the top of the Face Seal Adaptor threads inside the base of the spill container — — bucket just below the drain valve outlet window to the ° PW=S0 i===== inside,top lip of the storage tank(Dim."A") (See Figure - Gontairter 1 &1 A). Jack Screw Measure to here Kit The top flange on the 71 SO will rest on the Face Seal for Jack Screw Adaptor just below the drain valve outlet,and be installation O-Ring Seal locked in place between the Face Seal Adaptor and the (Top of Face Face Seal 4 Seal Adaptor)nipple that is installed in the spill container with the 71 SO Adaptor Jack Screw Kit(See Figure 1 A). (For riser pipe configu- rations other than that shown,consult installation drawings or use other necessary means to measure Di- Figure 1A mension "A"). Using a tape measure, measure the distance from the 5