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Determine drop tube I ' t <br /> - � 0 4 <br /> Defender Spill Containment(Ref.) 041 �Si9•,�$���� <br /> rYf <br /> Seat surface of upper drop tube <br /> i,— ♦ t ' <br /> „X„ Topfof Tank <br /> - <br /> Upper Drop Tube \ <br /> Final Shutoff Volume' <br /> Overfill Prevention Valve <br /> Lower B++ <br /> Drop Tube j " <br /> r+Y <br /> it <br /> 1 <br /> „Y„ <br /> I� <br /> I <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 /> DtW 40 <br /> Calculate final shutoff volume <br /> To find Upper Drop Tube length"X" To find Lower Drop Tube length"V" <br /> Actual Tank Capacity Drop tube seat r, Final shutoff I <br /> Gallons „A„ �_7 surface to "B" S votume height <br /> bottom of tank <br /> X (Multiply) - (Subtract) - (subtract) OPV Length <br /> Typically 95%"" rg++ JS Final shutoff 15'/1'(400 mm) offset <br /> volume height _ (Subtract) <br /> = Final shutoff volume - (subtract) Tank bottom <br /> Position and .S 9 052mm) <br /> (gallons) 2Yi'(63.5 mm) mounling clearance <br /> adjustment <br /> (equals) =(equals) <br /> _ <br /> i <br /> ,a = B „X„ 67 „Y„ y.75 <br /> Final Shutoff Volume Height Upper Drop Tube Length Lower Drop Tube Length <br /> f 6 <br />