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Determine dmp tube lengths <br /> Defender Spill Containment ( Ref. ) <br /> Seat surface of upper drop tube <br /> 0 <br /> Top of Tank <br /> Upper Drop Tube T—`- - <br /> �-- Fina : Shutoff Volume* * <br /> Overfill Prevention Valve <br /> " Ar, <br /> ( U . S .T.) <br /> Lower " Brr <br /> Drop Tube <br /> kr <br /> rr � „ <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 /> I <br /> Calculate final shutoff volume <br />[ <br /> Actual Tank Capacity To find Upper Drop Tube length " X" To find Lower Drop Tube length " Y" <br /> Drop�1 �J Gallons "A" 3 " <br /> surface to seat B n Final shutoff <br /> l bottom of tank volume height <br /> X (Multiply) - (Subtract) - (subtract ) - OPV Length <br /> 95 Typically 95%** „ g„ n Final shutoff 15'/8" (400 mm ) Of set <br /> volume height _ (subtract) <br /> Final shutoff volume - ( subtract) Position and 6" { 152mm ) cTan <br /> learance bottom <br /> (gallons ) 2 '/z" (63. 5 rn mounting <br /> adjustment <br /> _ (equals ) _ (equals ) <br /> Ilyl <br /> Final Shutoff Volume Height ubPcr drop T_be Length ower OroTube Lon �ti <br /> 6 <br /> v <br />