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Determine drop tube lengths <br /> Defender Spill Containment(Ref.) <br /> • - e <br /> • <br /> e <br /> Seat surface of upper drop tube <br /> 0 <br /> 84Xpl Top of Tank <br /> Upper Drop Tube / <br /> �- Final Shutoff Volume`* <br /> Overfill Prevention Valve <br /> eeAfl <br /> (U.S.T.) <br /> Lower "B" <br /> Drop Tube <br /> ti1Jf4 <br /> t <br /> Isyll <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 /> " �, " Final shutoff <br /> q9110 Gallons "Art surface to ��� - <br /> bottom of tank t3 volume height <br /> X (Multiply) - (Subtract) - (subtract) <br /> OPV Length <br /> .95 Typically 95%** Final shutoff I 15°/."(400 mm) offset /Y <br /> volume height <br /> (subtract) <br /> Final shutoff volume - (subtract) Tank bottom <br /> Position and 6" (152mm) <br /> (gallons) 2W(63.5 mm) mounting clearance <br /> adjustment <br /> j =(equals) =(equals) <br /> B e — <br /> Final Shutoff Volume Height Upper Drop Tuba Lenggt I LawarDrop Tube Len Ih <br /> 6 <br />