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-DSS _ <br /> 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 t- in <br /> clude the <br /> protect ve 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)= ; <br /> = 5 � io) <br /> (Uf I <br /> Upper <br /> Tube <br /> Distance from the 71 SO inlet tube flange to the bottom 7 ( . <br /> of the tank. Nate; 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 /> (B)_ �'�� � (W)Valve <br /> Length, <br /> bottom <br /> From the tank calibration chart provided by tank manu- 4, i of cut <br /> facturer find the dipstick number(Y)which corresponds <br /> to the 10040 volume. (B) <br /> (Y}= To Tank <br /> a <br /> 1. To determine complete shut-off percentage: M i <br /> Subtract upper tube length(D)from distance to tank (U)Valve Tank ; <br /> Chart ') <br /> bottom(B) Length, <br /> (X}_ .5"= c7� . L Volume(B)—(D)+1 <br /> top of 1 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 /> Comolete SO%_(X)capacity 1(Y)capacity x100= <br /> �L S 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 /> 24 <br />