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I � <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 />n <br />Desired tank capacity for shut-off: so./.= 9qIo <br />Dipstick Number (Y) on Tank Chart that corresponds to 100% volume = <br />Dipstick Number on Tank Chart that corresponds to S0% (X) _ — � 5 (X) <br />Upper Tube Deference Number Z=Y-X '�' 6�S (Z) <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 Tank' A= i 3-5 <br />For Non -Testable 7150 models only <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.' 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 1/2" 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 Testable 715 0 models only <br />In all cases for Testable 71 SO models, the top of the valve body must protrude at least 51/2" into the tank to provide <br />a minimal clearance for proper operation.' Additionally the total Upper Tube Length must beat least 14'/2" of <br />length to include tine protective bend in the tube. <br />Is C less than 6 112" Yes /V9 <br />If NO, Upper Tube Length (D)= C +A - 1 112 " <br />If YES, Upper Tube Length (D) = 61/2" + A - 1 '12 " <br />Upper Tube Length = �5 <br />' Sealing surface may be the top of the Face Seal Adaptor, the built in sealing ledge inside some spill containers, or a+7 non -vapor <br />tight applications the top of the pipe nipple <br />a Some underground Storage tanks utilize a rnanwaysystem 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 man way <br />' This measurement is taken from the searn where the upper tube is attached to the valve body to the inside of the tank top. <br />20 <br />