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Appendix C ( continued) <br /> 7150 Overfill Valve in Tank Complete Shut Off Level Worksheet <br /> Important: This is meant to be supplemental worksheet and not a substitute to fallowing 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 s"' • °`i <br /> lug in the 71 SO body (see figures ), upper tube length . <br /> Nate: the Upper Tube Length must be at least 16" to in � <br /> cludethe protective bend in the tube. <br /> ( D) y S `t <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 Itt <br /> may be necessary to add this thickness to dimension <br /> (OPW 6111 & 611TP models add 0.6") (W) Valve <br /> (B) _ `� � — Length,bottom <br /> +; <br /> From the tank calibration chart provided by tank mann- of cut 'r <br /> facturer find the dipstick number (Y) which corresponds <br /> to the 100% volume. (B) <br /> (Y) _ ti- To Tank <br /> 1 . To determine complete shut-off percentage : {Y)Tank <br /> Subtract upper tube length ( D) from distance to tank (U) Valve Chart <br /> bottom (B) �. s Length, 100% <br /> (X) _ ( B ) -- (D) + 1 .5 _ top of Volume Is <br /> Dipstick <br /> Using the tank calibration chart provided by the tank <br /> manufacturer determine the tank capacity at the cal" r <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 /> CoO % _ (X) capacity / ( Y) capacity x100 = <br /> Nate: 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 />