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Appendix A <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%� g 5 <br /> Dipstick Number on Tank Chart that corresponds to 100% volume (Y) = 14 4 '+ 6 1 I 3/y I / (y) <br /> Dipstick Number on Tank Chart that corresponds to SO% (X) <br /> UpperTube' Reference Number Z=Y-X l2 s (Z) <br /> Upper Tube Depth Inside Tank C = Z-2" 2 <br /> Distance from top sealing surface for 7150 Lip ' to inside the o S (C) <br /> top of Storage Tank' A= 90 'Al " <br /> ForWonmTestabIa7jSOMLdftjjo <br /> In all cases for no es le 71 SO models, the top of the valve body must protrude at least 61/2" into the tank to <br /> provide a minimal clearance for proper operation ' Additionally 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 61/2" YesNo <br /> If NO, Upper Tube Length (D)= C + A 10 519 + 0 '/Y _ 'Ag 4 <br /> If Yl3S, Upper Tube Length (D)= 61/2 " 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 61/2" into the tank to provide <br /> a minimal clearance for proper operation ' 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 /> If NO, Upper Tube Length ( D)= C + A — 1 1/2 " <br /> If YES, Upper Tube Length ( D) = 61/z" + A — 1 1/z " <br /> Upper Tube Length <br /> i <br /> ' Sealing surface maybe the top of the Face Seal Adaptor, the built In sealing ledge inside some spill containers, or on non-vapor <br /> tight applications 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 measure- <br /> ment and not to top of the manway. Consult your underground tank manufacturer for height of the manway <br /> ' This measuremeht Is taken from the seam where the upper tube is attached to the valve body to the inside of the tank top. <br /> s <br /> 20 <br />