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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 the 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 requirements governing <br /> shut-off capacity in your region, as well as take into account other considerations such as extreme tank tilt. <br /> Desired tank capacity for shut-off: SO %= <br /> Dipstick Number on Tank Chart that corresponds to 100% volume (Y) _ 2 f I (Y) <br /> Dipstick Number on Tank Chart that corresponds to SO% (X) _ '— 7Z .l5 (X) <br /> Upper Tube Reference Number Z=Y-X <br /> 15. 5 ^ (z) <br /> 2 <br /> Upper Tube Depth Inside Tank C = Z-2" <br /> 1 . 75 " (C) <br /> Distance from top sealing surface for 71 SO Lip ' to inside the <br /> top of Storage Tan k2 A= <br /> ( <br /> For Non -Testable 71 SO models only <br /> In all cases for non-testable 71 SO models, the top of the valve body must protrude at lqast ,6 1/2!�,,"into-jhe! tbftk to <br /> provide a minimal clearance for proper operation3 Additionally the total Uppru3e-1 ength=mtls't be.eatiesi6 <br /> of length to include the protective bend in the tube . <br /> Is C less than 61/2" Yes A <br /> If NO, Upper Tube Length ( D ) = C + Aa° ) ` f' " <br /> If YES, Upper Tube Length (D )= 6 Y2 "+ A <br /> Upper Tube Length = <br /> For Testable 71 SO models only <br /> In all cases for Testable 71 SO models, the top of the valve body must protrude at least 6 '/2" into the tank to provide <br /> a minimal clearance for proper operation .3 Additionally the total Upper Tube Length must beat least 141/2" of <br /> length to include the protective bend in the tube. <br /> Is C less than 5 " Yes / No <br /> g <br /> If NO, Upper Tube Length ( D)= C + A — '/z " <br /> If YES, Upper Tube Length (D) = 61/2" + A — 1 1/2 " <br /> Upper Tube Length = <br /> I Sealing surface may be the top of the Face Seal Adaptor, the built in sealing ledge inside some spill containers, or on non- <br /> vapor tight applicatlons the top of the pipe nipple <br /> 2 Some Underground Storage tanks utilize a manwaysystem at the top. Make sure to use the top of the storage tank for <br /> measurementandnotto top of the manway. Consultyour underground tank manufacturer for height of the manway <br /> 3 This measurementis taken from the seam where the upper tube is attached to the valve body to the inside of the tank top. <br /> 20 <br />