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� I . <br /> AMndix 8 <br /> 71 SO Overfill Valve in Tank Shut off level Worksheet <br /> This is meant to be supplemental worksheet and not a substitute to following the installation <br /> ns <br /> manual bions. Ail en me—as uremeri�s ars nTncTtes. P�Tease 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 7150 inlet tube flange to the cast <br /> lug in the 71SO body(see figures),upper tube length. <br /> Note: the Upper Tube Length must beat least 16"to in- <br /> clude the protective bend in the tube. <br /> (D)= 2 31 <br /> Distance from the 71 SO Inlet tube flange to the top and <br /> bottom of lowerbe,valve length. (D) <br /> (W)= <br /> (U)=. Upper <br /> t Tube <br /> Distance from the 7150 inlet tube flan a the bottom <br /> of the tank. Note:If a tank bo rote or Is present it <br /> may be necessary to add this thickness to dimension <br /> (OPW 611 &6ITP models add 4.6") (W)Valve <br /> (a)= /62 <br /> Length, <br /> bottom of <br /> From the tank calibration chart provided by tank manu- cut <br /> factures find the dipstick number(Y)which corresponds <br /> to the 100%volume. (i3} <br /> (Y)= To Tank <br /> 1. To determine shut-off percentage: (Y) <br /> Subtract upper tube length(D)from distance to tank (U) Tank <br /> e <br /> bottom(B) LVath, Chart <br /> (X)-(B)—(D)-2"_ 2 � ' Length, 100% <br /> top of cut Volume <br /> Using the tank calibration chart provided by the tank Dipstick -- <br /> manufacturer determine the tank capacity at the cal- <br /> culated(X)dimension and the 100%volume(Y)tank <br /> I <br /> capacity, <br /> (X)tank capacity ingallons= L0Iw57 <br /> (Y)tank capacity in gallons= if <br /> Z <br /> SO%_(X)capacity!(Y)capacity X1 00 J= i <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 GFR part 280 Subpart B Section 280.20 overfill <br /> valves should be set to a maximum of gs%. <br /> 21 <br />