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Appendix B <br /> 71 SO Overfill Valve in Tank 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 /> \ ake the following measurements with the valve in- <br /> s t%led in the tank: <br /> Dista a from the 71 SO inlet tube flange to the cast <br /> lug in th 150 body(see figures),upper tube len K. <br /> Note: the U er Tube Length must be at least 16" in- <br /> clude the prote 've bend in the tube. <br /> (D)_ <br /> Distance from the 71 SXlet tube fl getothetopand <br /> bottom of lower tube, n (D) <br /> (W)_ Upper <br /> (U)_ Tube <br /> Distance from e 71 SO inlet tube flan to the bottom _ <br /> of the tan ote:If a tank bottom protec r is present it <br /> may b ecessary to add this thickness to di nsion <br /> (0 6111 &61TP models add 0.6") (W)Valve <br /> \ Length, <br /> bottom of <br /> From the tank calibration chart provided by tank manu\ cut <br /> facturer find the dipstick number(Y)which corresponds <br /> to the 100%volume. (B) <br /> (Y)_ p 3/� To Tank <br /> (Y) <br /> 1. To determine shut-off percentage: Tank <br /> Subtract upper tube length (D)from distance to tank (U)Valve Chart <br /> bottom(B) _ l Length, 100% <br /> (X)_(B)-(D)-2"_ �� �C-'-d 1 � c4w ) top of cut Volume <br /> Dipstick <br /> Using the tank calibration chart provided by the tank <br /> i <br /> manufacturer determine the tank capacity at the cal- <br /> culated(X)dimension and the 100%volume(Y)tank <br /> capacity. <br /> i <br /> (X)tank capacity in gallons= 74 1506 <br /> (Y)tank capacity in gallons= I I / <br /> SO%_(X)capacity/(Y)capacity x100= I�7 c!" <br /> Note: The overfill valve must be Installed per AHJ require- <br /> ments and all applicable local,state,and national codes. If <br /> the overfill valve is set above the allowable shut-off percent- <br /> age the overfill valve must be removed and replaced. For <br /> reference 40 CFR part 280 Subpart B Section 280.20 overfill <br /> valves should be set to a maximum of 95%, <br /> 21 <br />