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�fy = 11103 X o 15 Appendix A 71 SO Overfill Valve Upper Tube Calculation Worksheet Important, This is meant to be supplemental worksheet and not a substitute to following the installation manual instructions. All length measurements are in inches. Please contact the Authority Having Jurisdic- tion (AHJ) and review local, state, and national codes to determine the regulatory requirements governing shut-off capacity in your region, as well as take into account other considerations such as extreme tank tilt. Desired tank capacity for shut-off: SO%= Dipstick Number on Tank Chart that corresponds to 100% volume (Y) _ f 3 (y) Dipstick Number on Tank Chart that corresponds to SO% (X) _ / /� I M Upper Tube Reference Number Z= i 23/8 (Z) Y-X Upper Tube Depth Inside Tank C = Z-2" 2 Distance from top sealing surface for 71 SO Lip' to inside the 3 (C) ; top of StorageTank ' R.-I 'f 6,4k ho- k a wma.#A �j w ;• 0k �, r`Iser Y3 ' ' A= L /y ere fes& Thi rneaGultw�c As "fn ob�lgi „ "A" k •c � bwwo . dq +&%kl .o n oG c stat ad •kms " & iv# e. +aA4:,, c6, .� no �jo VOIWW C. d4sfi 'ck r 3 For Non-Testable 71 SO models only In all cases for non-testable 71 SO models, the top of the valve body must protrude at least 6 '/2" into the tank to provide a minimal clearance for proper operation.' Additionally the total Upper Tube Length must beat least 16" of length to include the protective bend in the tube. Is C less than 6 '/z" Yes / No If NO, Upper Tube Length (D)= C + A / b If YES, Upper Tube Length ( D)= 6 '/z "+ A lye y Upper Tube Length = 63 /d For Testable 71 SO models onl In all cases for Testable 71 SO models, the top of the valve body must protrude at least 6 '/x" into the tank to provide a minimal clearance for proper operation .3 Additionally the total Upper Tube Length must beat least 141/2" of length to include the protective bend in the tube. Is C less than 5 " Yes / No If NO, Upper Tube Length ( D)= C + A - 1 '/i " If YES, Upper Tube Length (D) = 6 '/2" + A - 1 '/2 " Upper Tube length ' Sealing surface maybe the top of the Face Seal Adaptor, the built In sealing ledge inside some spill containers, or on non-vapor tight applications the top of the pipe nipple 1 Some Underground Storage tanks utilize a manway system at the top. Make sure to use the top of the storage tank for measure- ment and not to top of the manway. Consult your underground tank manufacturer for height of the manway 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.