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-2 . 19 `�- s <br /> Appendix B <br /> 71 SO Overfill Valve in Tank Initial Shut off Level Worksheet <br /> Important: This is meant to be supplemental worksheet and not a substitute to following the installation <br /> manual instructio is. 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 i your region,as well as take into account other considerations such as extreme tank tilt. <br /> Take the followinc measurements with the valve in- <br /> stalled in the tank 41t, <br /> Distance <br /> Distance from the 71 SO inlet tube flange to the Zast � <br /> lug in the 71 SO bc dy(see figures),upper tube length. P <br /> Note: the Upper Tube Length must be at least 16"to in- <br /> clude the protective bend in the tube. <br /> Distance from the 1 SO inlet tube flange to the top and i <br /> bottom of lower to e,valve length. I r <br /> (W)= j (D) <br /> = 3 Upper <br /> (U) <br /> Tube <br /> Distance from the 71 SO inlet tube flange to the bottom -- ----.-1.-- J.� -=�---.-of the tank. Note: I a tank bottom protector is present it <br /> may be necessary to add this thickness to dimension <br /> (OPW 61 1 1 &61 TP models add 0.6") (W)Valve <br /> (B) Length, <br /> bottom of` <br /> From the tank tali ration chart provided by tank manu- �lL cut <br /> facturer find the di stick number(Y) which corresponds <br /> tothe 100%voW e. (B) <br /> (Y)_ / To Tank y <br /> / Y9 * i ' `y) <br /> 1. To determine but-off percentage: I V) Tank <br /> Subtract upper to e length (D)from distance to tank (U)Valve g Chart �f <br /> bottom (B) Length, —� 100% !I <br /> (X)_(B)—(D)-2„ �j a' 3 )_(32 0 -MY top of cut Volume If <br /> f Y/$5 Dipstick j! <br /> Using the tank ca ibration chart provided by the tank <br /> manufacturer del ermine the tank capacity at the cal- l <br /> culated(X)dimension and the 100%volume(Y)tank <br /> capacity. d <br /> Al <br /> (X)tank capacity n gallons= <br /> (Y)tank capacity n gallons= SYS 4-6 <br /> SO%=(X)capaci y/(Y)capacity x100= Y- <br /> Note: The overfill valve must be installed per AHJ require- <br /> 1 ments and all applicable local,state,and national codes. If <br /> the overfill valve is set above the allowable shut-off percent- <br /> 1(01 (� I 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 />