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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%= 3/ U <br /> Dipstick Number on Tank Chart that corresponds to 100% volume (Y) = L L�--�-1 (Y� t i / 4 <br /> Dipstick Number on Tank Chart that corresponds to SO% ( X) EIF_ f �� / g 'r <br /> Upper Tube Reference Number Z=Y-X t 3 (Z) L , Qy�j <br /> 2 - 2 <br /> Upper Tube Depth Inside Tank C = Z-2 " <br /> Distance from top sealing surface for 71 SO Lip ' to inside the t f (C) l 00 S ? S <br /> top of Storage Tankz A= <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 least 6 '/2" into the tank to <br /> provide a minimal clearance for proper operation .3 Additionally the total Upper Tube Length must beat least 16" <br /> of length to include the protective bend in the tube . <br /> r <br /> Is C less than 6 '/2" Yes / Vo �' <br /> If NO, Upper Tube Length (D)= C + A <br /> If YES, Upper Tube Length (D)= 6 1/2 "+ 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 6 '/z" 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 e . <br /> Is C less than 5 " Yes I No <br /> If NO, Upper Tube Length ( D)= C + A — 1 1/2 " <br /> If YES, Upper Tube Length (D) = 6 '/� " + A — 1 '/2 " <br /> Upper Tube Length = <br /> Sealingsutface maybe the top of the Face Sea/Adaptor, the builtin sealing ledge inside some spill containers, oron non- <br /> vapor tightapplications the top of the pipe nipple <br /> 1 Some Underground Storage tanks utilize a man way system at the top. Make sure to use the top of the storage tank for <br /> measurementandnottotop ofthe manway. Consultyourunderground tankmanufacturerfor height ofthe 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 />