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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%= cf <br />Dipstick Nurnber M on Tank Chart that corresponds to 100%volume = . N <br />Dipstick Number on Tank Chart that corresponds to SO% M = — (Z} <br />Upper Tube Reference Number Z=Y-X 2 ��} <br />Upper Tube Depth Inside Tank C = Z-2" <br />Distance from top sealing surface for 71 SO Lip' to inside the <br />top of Storage Tank' A= 5� l .315 <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 Vz" 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 6112" Yes 1� <br />If NO, Upper Tube Length (D)= C + A <br />If YES, Upper Tube Length (D)= 61h "+ A <br />Upper Tube Length = �� <br />For Testable 7150 models o"l <br />In all cases for Testable 71 SO models, the top of the valve body must protrude at least 6112" into the tank to provide <br />a minimal clearance for proper operation.' Additionally the total Upper Tube Length must beat least 1411x" of <br />length to include the protective bend in the tube. <br />Is C less than 6112" Yes 1 No <br />If NO, Upper Tube Length (D)= C + A -1 1/2 " <br />If YES, Upper Tube Length (D) = 61/2" + A -1 1/2 " <br />Upper Tube Length = <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 />Some Underground Storage tanks utilize a manway system at the top. Make sure to use the tap 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 />20 <br />