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pppp— <br /> C <br /> �- Tank# T3-87C <br /> Determine drop tube lengths <br /> Defender Spill Containment(Ref.) <br /> - <br /> Seat surface of upper drop tube <br /> 0 <br /> «X„ <br /> Upper Drop Tube Top of Tank <br /> Final Shutoff Volume' <br /> Overfill Prevention Valve <br /> «A» <br /> (U.S.T.) <br /> Lower «B» <br /> Drop Tube <br /> «Y„ <br /> , <br /> rr1 „ <br /> Y <br /> 6" (152 mm) Maxim <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 /> 119,951 ' " 161 "B" 105 5/8" volume heFinal ight <br /> Gallons `A surface to <br /> ff <br /> bottom of tank <br /> X (Multiply) - (Subtract) - (subtract) <br /> OPV Length <br /> 94% Typically 95%** "B" 105 5/8" Final shutoff 153/4' (400 mm) Offset <br /> (subtract) <br /> volume height <br /> - (subtract) <br /> — - <br /> Final shutoff volume 2'/z' Position and 6" (152mm) Tank bottom <br /> 18,750 (gallons) (63.5 mm) mounting clearance <br /> =(equals) adjustment = (equals) <br /> 105 5/8" = B X„ 52 7/8" 4(Y" 83 7/8" <br /> Final Shutoff Volume Height Upper Drop Tube Length Lower Drop Tube Length <br /> 6 c: <br />