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SITE ` Sat /, /"/ftc �Rnk : 1 l - O / H a 7 ?IqlrvL L^o�y Appendix 8 71 SO Overfill Valve In Tank Shut off Level Worksheet tmpgrtaht: This Is meant to be supplemental worksheet and not a substitute to following the Installation manual instructions , All length measurements are in Inches . Please contact the Authority Having lurlsdic- tion ( AHA and review local, state, and national codes to determine the regulatory requirements governing shutoff capacity In your region, as well as take Into account other considerations such as extreme tank tih. F - - -- - - - Take the following measurements with the valve In- stalled In the tank: Distance from the 71 SO Inlet tube flange to the cast lug In the 71 SO body (see figures), upper tube length . Note: the Upper Tube Length must be at least 16' to In- clude the protective bend In the tube. I Distance from the 71 SO Inlet tube flange to the top and bottom of lower tube, valve length. TIp) r ( W) = Upper I (U) c Tube Distance from the 71 SO Inlet tube flange to the bottom of the tank. Note: If a tank bottom protector is present It j may be necessary to add this thickness to dimension j i (OPW 6111 & 61TP models add 0,6") I ff (W) Valve (B ) Length, bottom of From the tank calibration chart provided by tank manu- I cut facturer find the dipstick number (Y) which corresponds to the 100% volume. (Y) To Tank (Y) 1 . To determine shut-off percentage: i Tank Subtract upper tube length (D) from distance to tank (U) Valve Chart bottom (B) Length, - - 100% (X) (B ) - (D) - 2" = --_L 4 7 S I top of cut Volume Dipstick Using the tank calibration chart provided by the tank manufacturer determine the tank capacity at the cal- culated (X ) dlmenslon and the 100% volume (Y) tank I ! capacity, (X) tank capacity In gallons = 6 \ I 1 I ( Y) tank capacityin gallons = 50% = ( X ) capacity / ( Y) capacity x100 Note: The overfill valve must be Installed per AH1 require- ments and all applicable local, state, and national codes, If U f S the overfill valve Is set above the allowable shut- off percent- age the overfill valve must be removed and replaced . For reference 40 CFR part 280 Subpart B Section 280.20 overfill valves should be set to a maximum of 95%, 21 Va1 ., tS cw� 115b `� tStRb�Q Qrwt v�r; os't MW4) q0 Ake, l5o Dvtf �:�� Qrt �Iwr�'� o ✓� 1 � �^ s -�'ktlrti � orn ttnn. d Mair` kwLgN� t-f- 1v%5 �Vvrr� av\ s .