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0 <br /> STEP 15: DIMPLE REMAINING HOLES STEP 18: LOWER TUBE ASSEMBLY <br /> Loosen the other two knobs on the 71 SO-TOOL and If a vise is used,clamp on the valve body casting <br /> remove the tool from the inlet tube. Remove any only to avoid damage to the float and tubes. Thread <br /> chips or burrs from the drilling operation. Dimple the the lower tube onto the valve body until the lower <br /> next(2)holes as done in Step 13. Make sure the tube bottoms out on valve body. Tube can be <br /> assembly is on a solid surface when punching. After tightened by hand or with a strap wrench. If a strap <br /> punching, remove any chips that may have fallen wrench is used try to position it on the threaded <br /> into the inlet tube screw hole. insert portion of the lower tube to prevent damaging <br /> the tube. <br /> Align punch with <br /> drilled hole <br /> Threaded insert <br /> Figure 18 <br /> Note: Before installing the valve in the tank, a <br /> ® pressure test can be performed on the valve to <br /> check for vapor tightness. Seal off both ends of the <br /> Figure 15 tube with inflatable plumber's plugs.Apply a <br /> maximum 10"W.C.(1/3 PSI)air pressure. If <br /> STEP 16: ASSEMBLE OTHER SCREWS pressure does not hold and a leak can be located <br /> Apply black molt'grease to screws and tighten the with soap solution, do not install the valve. Send the <br /> other(2)screws into inlet tube with a screwdriver as valve back to OPW for warranty evaluation. <br /> done in Step 14. Use only the taptite screws that Caution: Do not over-pressurize. Excess pressure <br /> are supplied with the unit. Seating torque is 20 in- can damage the valve. <br /> lbs min.to 35 in-lbs max. Do not over tighten. <br /> STEP 19: CUT LOWER TUBE <br /> STEP 17: APPLY GREASE TO LOWER O-RING Measuring from the underside of the inlet tube <br /> AND BODY THREADS flange, mark the overall length of the drop tube a <br /> Apply black molt'grease to the lower tube o-ring and distance of(B)minus 6". Determine dimension(B) <br /> body threads as shown. Make sure coverage is from the measurements taken in Step 1, Figure 1 <br /> completely around the o-ring. Install o-ring in groove (Top of the Face Seal Adapter below the drain valve <br /> just above threads. outlet in the spill container to the bottom of the tank). <br /> Saw off the excess tube at a 45-degree angle or per <br /> local codes or requirements and file off any sharp <br /> Apply grease burrs(Refer to Figure 24). Optional: Install the OPW <br /> around o-ring Tank Bottom Protector on the lower tube(Refer to <br /> Installation instructions supplied with the Tank <br /> Bottom Protector). <br /> IMPORTANT: Remove all chips and shavings out of <br /> the cut end of the tube. DO NOT remove chips and <br /> shavings by dumping thru valve body. <br /> O-ring <br /> groove Body threads <br /> Figure 17 <br /> OPW 71 SO Overfill Prevention Valve Page 9 <br />