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IIIA Ae� S-WQ,.t -1�VI,CA <br /> 1[2,OLb o-RJ en 4mk - Jv eaJ <br /> Determine drop tube lengths <br /> Defender Spill Contain ent(Ref.) <br /> Seat surface of upper drop tube <br /> 0 <br /> X rr Fly Top of Tank <br /> Upper Drop Tube <br /> �— Final Shutoff Volume*" <br /> Overfill Prevention Valve <br /> "All <br /> (U.S.T.) <br /> Lower "Elly <br /> Drop Tube <br /> rcYu <br /> LJ 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 /> 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 /> qo4- Gallons "A" (5 �/8 surface to "B" I I /2 Final shutoff <br /> bottom of tank volume height <br /> X (Multiply) - (Subtract) - (subtract) <br /> OPV Length <br /> .95 Typically 95%** "B" I If IiZ to T11 Final shutoff 15'/<"(400 mm) Offset <br /> volume height <br /> Final shutoff volume - (subtract) <br /> - (subtract) <br /> ( <br /> 1r3CJ (gallons) 2/. mound(63.5 mm) Position—" <br /> 6"(152mm) leara cep <br /> =(equals) adjustment =(equals) <br /> 114 '% = B ..X" 4 1-'is," „Y" 92 -75 r/ <br /> Final Shutoff Volume Height Upper Drop Tube Length Lower Drop Tube Length <br /> 6 <br />