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I <br /> Appendix AA <br /> 71 SO Overfill Valve Upper Tube Calculation Worksheet <br /> Important: This is meant to be supplemental worksheet and not a substitute to following//installation <br /> manual instructions . All length measurements are in inches . Please contact the Authority Having Jurisdic- <br /> tion (AHJ ) and review local, state, and national codes to determine the regulatory regyrirements governing <br /> shut-off capacity in your region, as well as take into account other considerations such as extreme tank tilt, 1 <br /> Desired tank capacity for shut-off: SO%= Mel /P �f <br /> Dipstick Number on Tank Chart that corresponds to 100% volume (Y) _ ' ' 7 q (Y) <br /> Dipstick Number on Tank Chart that corresponds to SO% (X) _ c� (X) <br /> Upper Tube Reference NumberZ=Y-X 0 (Z) <br /> Upper Tube Depth Inside Tank C = Z-2 " <br /> Distance from top sealing surface for 71 SO Lip ' to inside the r (C) <br /> top of Storage Tank2 A= <br /> For Non -Testable 71 SO models only <br /> In all cases for non -testable 71 SO models, the top of the valve /dyy must protrude at least 6 1/z" into the tank to <br /> provide a minimal clearance for proper operation .' Addition I y the total Upper Tube Length must beat least 16" <br /> of length to include the protective bend in the tube . <br /> Is C less than 6 '/2" Yes / !`No <br /> If NO, Upper Tube Length ( D) = C + A <br /> If YES, Upper Tube Length ( D) = 6 '/2 "+ A <br /> Upp rTube Length = <br /> For Testable 71 SO models only <br /> In all cases for Testable 7150 models, the top of he valve body must protrude at least 6 '/2" into the tank to provide <br /> a minimal clearance for proper operation .' Ad itionally the total Upper Tube Length must beat least 141/2 " of <br /> length to include the protective bend in the t be. <br /> Is C less than 5 " Yes / (/No <br /> If NO, Upper Tube Length ( D)= C + A — 1 2 " 1 <br /> i <br /> If YES, Upper Tube Length ( D) = 6 '/2" + — 1 1/2 <br /> Upper Tube Length = <br /> ' Sealing surface maybe the top of the Face Seal Adaptor, the ,built in sealing ledge inside some spill containers, or on non. <br /> vapor tight applications the top of the pipe nipple <br /> 1 Some UndergroundStorage tanks utilize a man waysystem at the top. Make sure to use the top of the storage tank for <br /> measurement and not to top of the manway. Consultyour underground tank manufacturer for height of the manway <br /> s This measurement is taken from the seam where the upper tube is attached to the valve body to the inside of the tank top. <br /> 20 <br />