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Appendix A <br /> 71 SO Overfill halve 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%= <br /> Dipstick Number on Tank Chart that corresponds to 100%volume(Y) <br /> Y <br /> Dipstick Number on Tank Chart that corresponds to SO%(X)_ � r0� (X) <br /> Upper Tube Reference Number Z=Y-X u (2) <br /> Upper Tube pepth Inside Tank C=Z-2". 2 <br /> Distance from top sealing surface for 71 SD t_ip1 to inside the 0 (C) <br /> top of Storage Tank2 A= <br /> For Non-testable 71 SO modeis only <br /> In all cases for non-testable 71 SO models,the top of the value 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 be at least 15" <br /> of length to include the protective bend in the tube. <br /> Is C less than 5112" Yes 1 No <br /> If NO,Upper Tube Length(D)=C+A <br /> If YES,Upper Tube Length(D)=61/2"+A <br /> Upper Tube Length <br /> For Testabig2lSO Mgdels <br /> In al I cases for Testable 71 SO models,the top of the valve body must protrude at least 6 W into the tank to provide <br /> a minimal clearance for proper operation.3 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 5" Yes 1 No <br /> If NO,Upper Tube Length(p)=C+A^ 1 1/2" <br /> If YES„Upper Tube Length(D)=61/2"+A- 1 1/2" <br /> Upper Tube Length= <br /> ' Seating surface may be the top of the Face Seal adaptor,the bait€in sealing ledge inside some spill containers,or on non-vapor <br /> tight applications the top of the pipe nipple <br /> 2 Some Underground Storage tanks utilize a manway system at the top. Make sure to use the top of the storage tank rarmeasurie- <br /> ment and not to tnp of the manway. Consultyourunderground 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 ofrhe tank top, <br /> 19 <br />