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WOW— f <br /> - Tank#1 <br /> Determine drop tube lengths <br /> Defender Spill Containment(Ref.) <br /> Seat surface of upper drop tube <br /> 0 <br /> «X„ Top of Tank <br /> Upper Drop Tube <br /> Final Shutoff Volume** <br /> Overfill Prevention Valve <br /> «A„ <br /> (U.S.T) <br /> Lower "B„ <br /> Drop Tube <br /> «1 „ <br /> Y <br /> 6" (152 mm) Max* <br /> Bottom of Tank Not to Scale <br /> * If local codes require this distance to be smaller, <br /> subtract less than 6" (152mm) <br /> Calculate final shutoff volume <br /> To find Upper Drop Tube length "X" To find Lower Drop Tube length "Y" <br /> Actual Tank Capacity Drop tube seat <br /> 19703 11 „ volume heI Final ight <br /> Gallons ff <br /> "A" 194.875 surface to "B" 105.375 <br /> bottom of tank <br /> X (Multiply) - (Subtract) - (subtract) OPV Length <br /> 95 Typically 95%** "B" 105.375 Final shutoff 153/a" (400 mm) Offset <br /> 11 volume height <br /> — - (subtract) <br /> Final shutoff volume - (subtract) Position and 6" (152mm) Tank bottom <br /> 18715 (gallons) 2'/z"(63.5 mm) mounting clearance <br /> _(equals) adjustment = (equals) <br /> = B X„ 87 «Y„ 83.625 <br /> Final Shutoff Volume Height Upper Drop Tube Length Lower Drop Tube Length <br /> 6 ,t <br />