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Appendix C(Continued) <br /> 71 SO Overfill Valve in Tank Complete Shut Off Level 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 /> Take the following measurements with the valve in- <br /> stalled in the tank: <br /> Distance from the 71 SO inlet tube flange to the cast ----- <br /> lug in the 71 SO body(see figures),upper tube length. <br /> Note: the Upper Tube Length must be at least 16"to in- <br /> clude the protective bend in the tube. <br /> (D)_ <br /> Distance from the 71 SO inlet tube flange to the top and <br /> bottom of lower tube,valve length. <br /> (W)_ (D) <br /> (U) = Upper <br /> Tube <br /> Distance from the 71 SO inlet tube flange to the bottom <br /> of the tank. Note:If a tank bottom protector is present it <br /> may be necessary to add this thickness to dimension <br /> (OPW 6111 &61 TP models add 0.6") <br /> Valve <br /> (B) _ (W) <br /> Length, r, <br /> bottom '1 <br /> From the tank calibration chart provided by tank manu- _ of cut <br /> facturer find the dipstick number (Y)which corresponds <br /> to the 100%volume. (B) <br /> (Y) = To Tank <br /> 1. To determine complete shut-off percentage: M <br /> II <br /> Subtract upper tube length (D)from distance to tank Tank <br /> pp g (U)Valve Chart <br /> bottom (B) Length, 100% <br /> (X)_(B)-(D)+ 1.5"= top of Volume <br /> Dipstick <br /> Using the tank calibration chart provided by the tank <br /> manufacturer determine the tank capacity at the cal- <br /> culated (X) dimension and the 100%volume(Y)tank <br /> capacity. <br /> (X)tank capacity in gallons= <br /> (Y)tank capacity in gallons= <br /> Complete SO%_(X)capacity/(Y)capacity x100= <br /> Note: The overfill valve must be installed per AHJ re- <br /> quirements and all applicable local,state,and national <br /> codes. If the overfill valve is set above the allowable <br /> shut-off percentage the overfill valve must be removed <br /> and replaced. <br /> Note: This Appendix only applies to valves installed per Appendix C. See Appendix B for the standard valve <br /> installation tank shut off level worksheet. <br /> 25 <br />