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STEP 18: LOWER TUBE ASSEMBLY <br />If a vise is used, clamp on the valve body casting only to <br />avoid damage to the float and tubes. Thread the lower <br />tube onto the valve body until the lower tube bottoms <br />out on valve body. Tube can be tightened by hand or <br />with a strap wrench. If a strap wrench is used try to po- <br />sition it on the threaded insert portion of the lower tube <br />to prevent damaging the tube. <br />Fig <br />NOTE: Before installing the valve in the tank, a pres- <br />sure test can be performed on the valve to check for <br />vapor tightness. Seal off both ends of the tube with <br />inflatable plumber's plugs. Apply a maximum 10" <br />W.C. (1/3 PSI) air pressure. If pressure does not hold <br />and a leak can be located with soap solution, do not <br />install the valve. Send the valve back to OPW for <br />warranty evaluation. <br />CAUTION: Do not over -pressurize. Excess pressure <br />can damage the valve. <br />STEP 19: CUT LOWER TUBE <br />Measuring from the underside of the inlet tube flange, <br />mark the overall length of the drop tube a distance of <br />(B) minus 6". Determine dimension (B) from the meas- <br />urements taken in Step 1, Figure 1 (Top of the Face Seal <br />Adapter below the drain valve outlet in the spill con- <br />tainer to the bottom of the tank). Saw off the excess <br />tube at a 45 -degree angle or per local codes or require- <br />ments and file off any sharp burrs (Refer to Figure 24). <br />Optional: Install the OPW Tank Bottom Protector on <br />the lower tube (Refer to Installation instructions sup- <br />plied with the Tank Bottom Protector). <br />IMPORTANT: Remove all chips and shavings out of the <br />cut end of the tube. DO NOT remove chips and shav- <br />ings by dumping thru valve body. <br />FOR STANDARD VAPOR TIGHT MODELS, PROCEED <br />TO STEP 20 ON PAGE 14. <br />FOR TESTABLE MODELS, PROCEED TO PAGE 13. <br />12 <br />