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T�_ <br />Appendix A <br />71 SO Overfill Value 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: <br />Dipstick Number (Y) on Tank Chart that corresponds to 100°/a volume <br />Dipstick Number on Tank Chart that corresponds to S0% (X) - <br />Upper Tube Reference Number Z=Y-X <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 Tanl(2 <br />(C) <br />A=A3-yjf5 <br />For Non -Testable 7150 models only <br />In all cases for non -testable 7150 models, the top of the valve body must protrude at least 6112" into the tank to <br />provide a minimal clearance for proper operation.' 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 61/2" Yes 1 No <br />If NO, Upper Tube Length (D)= C + A <br />If YES, Upper Tube Length (p)= 61/2 "+ A <br />Upper Tube Length = <br />For Testable 7150 models only <br />In all cases for Testable 71 SO models, the top of the valve body must protrude at least 6 t/2" into the tank to provide <br />a minimal clearance for proper operation.' Additionally the total Upper Tube Length must beat least 14'12" of <br />length to include the protective bend In the tube. <br />Is C less than 6 112" Yes 1 No <br />If NO, Upper Tube Length (D)= C + A -- 1 1h " <br />If YES, Upper Tube Length (D) = 61/2"+A— 1 1/2 " <br />Upper Tube Length = <br />' Sealing surface may be the top of the Face Seal Adaptor, the built in sealing ledge inside some spill containers, oron non -vapor <br />tight applications the top of the pipe nipple <br />2 Some Underground Storage tanks utilize a man way system at the top. Make sure to use the top of the storage tank for measure- <br />mentandnot to top of the manway. Consult your underground tank manufacturer for height of the tnanwoy <br />' This measurementis taken from the searn where the upper tube is attached to the valve body to the inside of the tank top. <br />20 <br />