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Ono <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 /> «X„ <br /> Upper Drop Tube <br /> �-- Final Shutoff Volume" <br /> Overfill Prevention Valve <br /> «A„ <br /> (U . S .T. ) <br /> Lower rB „ <br /> Drop Tube <br /> «Y,l <br /> 1 <br /> rrY„ <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 /> Actual Tank Capacity To find Upper Drop Tube length "X" To find Lower Drop Tube length "Y" <br /> Drop tube seat <br /> 5 �- Gallons "A" " surface to « g„ Q U, ,7 }5 Final shutoff <br /> bottom of tank V volume height <br /> X (Multiply) - (Subtract) - (subtract) <br /> OPV Length <br /> 95 Typically 95%** „g „ g0 . j}5 Final shutoff 15%11 (400 mm) Offset <br /> volume height <br /> - (subtract) - (subtract) <br /> Final shutoff volume Position and „ Tank bottom <br /> 5 (gallons ) 6 (152mm) clearance <br /> ��� � allons 2'/" (63 . 5 mm) mounting <br /> = (equals) adjustment = (equals) <br /> „X„ <br /> Upper Drop Tube Length Lower Drop Tube Len th <br /> Final Shutoff Volume Height <br /> � : . ... _ .. �, 6 i <br />