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SJa,oC Appendix A <br /> 71 SO Overfill Valve Upper Tube Calculation Worksheet <br /> ImportThis 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 caipacity for shut-off: SO%= S <br /> Dipstick Number on Tank Chart that corresponds to 100% volume (Y) = ( �( q �6 I I �/y f 3i (y) <br /> p �— os '/g (X) <br /> Dipstick Number on Tank Chart that corresponds to SO% (X) = IH4 �G �' - 4 �" = lyz2 � <br /> Upper Tube' Reference Number Z=Y-X t 2 �/ (Z) <br /> Upper Tube Depth Inside Tank C = Z4" "� 2 <br /> Distance from top sealing surface for 71 SO Lip' to inside the / 017R] (C) <br /> top of Storage Tank2 A= � p 3A 4 <br /> For Non-Testable 71 SO m Wels only <br /> In all cases for non-testable 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 .3 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 6 1/z" Yes / No <br /> If NO, Upper Tube Length ( D)= C + A <br /> If YES, Upper Tube Length ( D)= 61/2 "•h 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 operation3 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 S" Yes / No <br /> If NO, Upper Tube Length ( D )= C + A - 1 ''/2 " <br /> If YES, Upper Tube Length (D) = 61/2" + A — 1 Yz " <br /> Upper Tube Length <br /> ' Sealing surface maybe the top of the race Seal Adaptor, the built In sealing ledge Inside some spill containers, or on non-vapor <br /> j tight applications the top of the pipe nipple <br /> a Some Underground Storage tanks utilize am anwaysystem 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 measurement is taken from the seam where the upper tube is attached to the valve body to the inside of the tank top, <br /> I <br /> 20 <br />