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Appendix C (Continued) <br /> 71 SO Overfill Valve Complete Shut Off Level Upper Tube Calculation Worksheet <br /> Important:This is meant to be a 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 tanktilt. <br /> Desired tank capacity for shut-off: SO%= <br /> Dipstick Number(Y) on Tank Chart that corresponds to 100%volume= 0 (y) <br /> Dipstick Number on Tank Chart that corresponds to SO%(X) _ E=:] (X) <br /> Upper Tube Reference NumberZ=Y-X 0 (Z) <br /> + 1.5 <br /> Upper Tube Depth Inside Tank E=Z+1.5" <br /> (E) <br /> Distance from top sealing surface for 71 SO Lip'to inside the <br /> top of Storage Tank' 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.'Additionally the total Upper Tube Length must be at least 16" <br /> of length to include the protective bend in the tube. <br /> Is E less than 6'/2" Yes/ No <br /> If NO,Upper Tube Length (D)= E+A <br /> If YES,Upper Tube Length (D)=6'/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'/2" into the tank to provide <br /> a minimal clearance for proper operation.'Additionally the total Upper Tube Length must be at least 14'/2"of <br /> length to include the protective bend in the tube. <br /> Is E less than 5" Yes/ No <br /> If NO,Upper Tube Length (D)= E+A- 1 1/2" <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,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 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 /> 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. <br /> Note: This Appendix only applies to valves installed per Appendix C. See Appendix A for the standard valve Upper Tube Calculation <br /> worksheet. <br /> 24 <br />