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Appendix B <br /> 71 SO Overfill Valve in Tank Shut off level Worksheet <br /> Important: This is meant to he 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 (AH!) 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)= sl' _) <br /> Distance from the 7150 Wet tube flange to the top and <br /> bottom ofjpv r tube,valve length. (D) <br /> (W)T ��jj Upper <br /> (V)_�— Tube <br /> Distance from the 7150 inlet tube flange to the bottom <br /> of the tank. (Vote: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") (W}Valve <br /> (B)» 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 the10 °k olume, f8} <br /> (Y)= To Tark <br /> i. To determine shut-off percentage: MTank <br /> Subtract upper tube length(D)from distance to tank (U)Valve Chart <br /> bottom(B) length, 100% <br /> (X)=(6)--(D)-2"_ 1� �-5 top of cut 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 /> SO%=(X) capacity/(Y)capacity x100 <br /> Note: The overfill valve must be installed per AHJ requ ce- <br /> ments and all applicable local,state and national codes !f <br /> the overfill valve s set above the a'owable shut-off percerr- <br /> age the o.erfi4 val-e ML:t be rerrcti ed ano epla-ed ' <br /> _Wei ence 40 C'1P oartISOSubpart a.Section ZflS?J tie i{ <br /> ralves sr o��d be ser :c a rraxim,�T of 95"-. <br /> 2' <br />