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Appendix C (continued ) <br /> 71 SO Overfill Valve in Tank Complete but 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 /> elude the protective bend in the tube . <br /> ( '- <br /> Distance from the 7150 inlet tube flange to the top andMass <br /> i <br /> bottom of lower tube, valve length . <br /> (w) = 113L (D) , <br /> ( u ) = t �.�� + - Upper <br /> Tube <br /> Distance from the 7150 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 6 11 i 61TP models add 0.6") ;+ <br /> ( B) "A `t (W) Valve <br /> Length, Ilk. <br /> bottom <br /> From the tank calibration chart provided by tank mane- of cut 'e <br /> facturer find the dipstick number (Y) which corresponds <br /> to the 100% volume. + <br /> (Y ) = ti To Tank <br /> \\U M <br /> 1 . To determine complete shut-off percentage: Tank <br /> Subtract upper tube length (D) from distance to tank (U) Valve Chart <br /> bottom (B) Length, 100% 1' <br /> ( X) _ (B) - (D) + 1 .5 = top of <br /> Volume ti <br /> Dipstick 5' <br /> Using the tank calibration chart provided by the tank " <br /> manufacturer determine the tank capacity at the cal- d <br /> culated ( X) dimension and the 100% volume (Y) tank <br /> capacity. allows <br /> J <br /> (X) tank capacity in gallons = ��� Was <br /> (Y) tank capacity in gallons = � <br /> complete 5O% _ (X) capacity / (Y) capacity x100 <br /> Note : The overfill valve must be installed per AFIJ 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 />