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L)6Z_ <br /> 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 /> Des!red tank capacity fors hut-off. 50a/a= <br /> Dipstick Number(Y)on Tank Chart that corresponds to 100%vol ume= `� .d {Y} <br /> Dipstick Number on Tank Chart that corresponds to SO%(X)= i]3't N <br /> Upper Tube Reference Number Z=Y-X 6'S' (Z) <br /> Upper Tube Depth Inside Tank C=Z-2" 2 <br /> Distance from top sealing surface for 71 SO Lip'to inside the {C} <br /> top of Storage Tank2 A=mm •37`�ta <br /> For Non-Testable 7150 models onl <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 be at least 16" <br /> of length to include the protective bend in the tube. <br /> Is C less than 6'I2" Yes 1 NG <br /> If NO,Upper Tube Length(D)=C+A <br /> If YES,Upper Tube Length(D)=5 1/2"+A <br /> Upper Tube Length=�? <br /> For Testable 7150 models only <br /> In all cases for Testable 71 S❑ models,the top of the valve body must protrude at least 61/2"into the tank to provide <br /> a minimal clearance for proper operation 3 Additionally the total Upper Tube Length must be at least 141/2"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 '/z" <br /> If YES,Upper Tube Length(D)=61/2"+A-1 %" <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 /> z Some Underground Storage tanks utilize a manway system at the top. Make sure to use the top of the storage tank for measure- <br /> mentandnotto top of the manway. Consult your underground rank manufacturer for height of the monway <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 />