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L <br /> Qti J r Appendix A <br /> 71 SO Overfill Valve Upper Tube Calculation Worksheet <br /> Im ortant This is meant to be supplemental worksheet and not a substitute to following the installation <br /> manual instructions. All length measure►nents 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 Ired tank capacity for shut-off. 5n%= <br /> Dipstick Number(Y)on Tank Chart that corresponds to 100%volume <br /> Dipstick Number on Tank Chart that corresponds to SO%(X) <br /> llpper Tube Reference Number Z=Y-X _ �5' (Z) <br /> Upper Tube[Depth Inside Tank C=2-2" <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 71SO 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 Lipper Tube Length must be at least 16" <br /> of length to include the protective bend in the tube. <br /> Is C less than 6I/z" Yes 1 ( Vo <br /> If NO, Upper Tube Length (Dj= C+A <br /> If YES,Upper Tube Length (0)=5'I�"+A <br /> Upper Tube Length <br /> For Testable 71 SO models on <br /> In all cases for Testable 71 SO models,the top of the valve body must protrude at least 6'/z"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 6 1/2" Yes / Na <br /> If NO,Upper Tube Length(D)= C+A-- 1 '/z" <br /> If YES,Upper Tube Length (D)=6'/z"+A- 1 '/z" <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 /> z Some underground Storage tanks utilize a manwaysystem at the top. Make sure to use the top of the storage tank for measure- <br /> rnent and not to top of the rnanway. Consult your underground tank manufacturer for height of the man way <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 />