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pppp— <br /> r-, <br /> Tank# T1 -87A <br /> Determine drop tube lengths <br /> Defender Spill Containment(Ref.) <br /> - ` - - - - <br /> Seat surface of upper drop tube <br /> 12 <br /> 0 <br /> Upper Drop Tube Top of Tank <br /> Final ShutoffVolume'* <br /> Overfill Prevention Valve <br /> «A„ <br /> (U.S.T.) <br /> Lower «B„ <br /> Drop Tube <br /> rav„ <br /> i <br /> «1 „ <br /> Y <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 /> 119,951 „ Drop tube seat "I Final shutoff <br /> Gallons "A" 157 5/8" surface to "B" 105 5/8" <br /> bottom of tank volume height <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 Position and 6" (152mm) Tank bottom <br /> 18,750 (gallons) 2'/2'(63.5 mm) mounting clearance <br /> _(equals) adjustment = (equals) <br /> 105 5/8" = B «X„ 49 1/2" «Y„ 83.7/8" <br /> Final Shutoff Volume Height Upper Drop Tube Length Lower Drop Tube Length <br /> 6 <br />