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'T3 = t� 9 <br /> 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 (AHA 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%= 95 <br /> Dipstick Number on Tank Chart that corresponds to 100% volume (Y) _ (y) <br /> Dipstick Number on Tank Chart that corresponds to SO% (X) _ — <br /> 0 CX) <br /> Upper Tube Reference Number Z=M I1 2 W (Z) <br /> Upper Tube Depth Inside Tank C = Z-2" ���� --� <br /> 2 <br /> Distance from top sealing surface for 71 SO Lip ' to inside the J (C) <br /> top of Storage Tank2 13a I% ,. , o � faM k +o --}o 19 o F Aee se 41 AV 1v 110 s A= $ L r <br /> `�i—amk� CIIOZ40 + / �D 10 C, 1 �S � Ck i/alv ,v. ( T z 3/Y <br /> F <br /> I <br /> For Non-Testable 71 SO models oniv <br /> In all cases for non-testable 71 SO models, the top of the valve body must protrude at least 6 '/z" into the tank to <br /> provide a minimal clearance for proper operation3 Additionally the total Upper Tube Length must be at least 16" <br /> of length to include the protective bend in the tube. <br /> Is C less than 6 '/z" Yes / No <br /> If NO, Upper Tube Length (D)= C + A j 0 �g <br /> If YES, Upper Tube Length (D)= 6 '/z "+ 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 .3 Additionally the total Upper Tube Length must beat least 14 '/2" of <br /> length to include the protective bend in the tube. <br /> Is C less than 5" Yes / No <br /> If N0, Upper Tube length (D)= C + A — 1 '/2 " <br /> If YES, Upper Tube Length (D) = 6 '/z" + A — 1 '/z " <br /> Upper Tube Length <br /> ' Sealing surface may be the top of the Face Seat 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 manway system at the top. Make sure to use the top of the storage tank for measur& <br /> ment and not to top of the manway. Consult your underground tank manufacturer for height of the manway <br /> 3 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 /> m <br />