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Tape measure -- — _, IMPORTANT: Remove all chips and shavings generated in steps 3 thru 5 out of the cut end of the tube . DO NOT remove chips and shavings by dumping thru valve body. Mark Upper Tube (Cut Line) STEP 4: FILE THE UPPER DROP TUBE !� File the upper tube square, and remove any burrs or Seam Figure 2 rough edges . Make sure the cut is flat and square . IMPORTANT: Carefully file a good chamfer on the in- STEP 3 : CUT THE UPPER DROP TUBE side edge of the drop tube to provide a lead - in for the Attach the supplied band clamp to the upper tube just polypak seal and inlet tube installed in Step 8 . below the mark and ensure that it is assembled square to the tube. The clamp can be used as a guide for mak- ing a square cut . If a vise is used , clamp on the valve body casting only to avoid damage to the float and tubes ( See Figure 3A) . Carefully saw through the tube squarely, at the mark made in Step 2 . Use a hacksaw with a new fine-tooth blade . Rotating the upper tube as the sawing progresses will minimize run out and en - sure a square 90-degree cut. Remove the band clamp after tube is cut. CAUTION - DO NOT use a pipe or tubing cutter to cut the upper drop tube, this may damage the tube, XFine half round file causing it to be out of round thereby prohibiting assembly of the unit. Figure 4 STEP S : SAND THE UPPER DROP TUBE ^ Sand the inside of the drop tube with sandpaper and/or steel wool to remove all burrs and sharp edges . After sanding wipe down the inside of the tube with a clean rag from the top to approximately 4 inches down to / remove any debris . Caution : Failure to properly chamfer, sand, and _ clean the drop tube may cut the seal and result in a ` failure of a pressure decay leak test. Figure 3A Band Clamp Fine grit sandpaper Cut Line Figure 5 Figure 3B 6