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C <br /> r Tank 2 87B <br /> Determine drop tube len hs <br /> Defender Spill Containment(Ref.) <br /> Seat surfaTap of Tank of upper drop tube <br /> srx„ <br /> Upper Drop Tube <br /> t � <br /> Final Shutoff Volume" <br /> I <br /> Overfill Prevention Valve <br /> "A„ <br /> (U.S.T.) <br /> Lower <br /> Drop Tube <br /> �rYrr <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 /> n-1 Final shutoff <br /> 29,816 Gallons "A" 161.75 surface to rr6" 107.50 1 volume height <br /> bottom of tank <br /> (Subtract)X (Multiply) - {Sbtt} - subtract OPV Lengtf, <br /> 95 Typically "B"'(subtract}107.50 Final shutoff 153/x"[440 mm) offset <br /> YP Y 95°/o�'" <br /> volume height <br /> - [subtract) <br /> — - <br /> Final shutoff volume Position and 6"(152mm) Tank bottom <br /> 28,325 (gallons) 2'%"(63.5 mm) mounting clearance <br /> _(equals) adjustment _ (equals) <br /> 107.50 = B 52.75 "Y,. 85.75 <br /> Final Shutoff Volume Height Upper Drop Tube Length Lower Drop Tube Length <br />