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q)ti ApRndix 6 <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 /> manual instructions. All Ie`K­g thirieastireroerits are Tri inches.—Pie asie contact the Authority HavingJurlsdlc- <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 <br /> lug In the 71 SO body(see figures),upper tube length. <br /> (Vote: the Upper Tube Length must be at least 16"to in- <br /> clude the protective bend in the tube. <br /> (D) <br /> Distance from the 71 SO Inlet tube flange to the top and <br /> bottom of lower toe valve length_ <br /> (W) (D) <br /> (U)= Upper <br /> Tube <br /> Distance from the 7150 inlet tube;fla:n a the bottom <br /> of the hank. Note:If a tank ho te or is present it <br /> may be necessary to add this thickness to dimension <br /> (OPW 6111 &61TP models add 0.6") (M Valve <br /> (g)= 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, (8) <br /> (Y)= To Tank <br /> 1. To determine shut-off percentage: (Y) <br /> Subtract upper tube length(D)from distance to tank Tank <br /> (U)Valve Chart <br /> bottom(B) , Length, <br /> (X)=(B)-(D)-2"a_ $ �� ? top of cut 100%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 /> capacity. q <br /> (X)tank capacity in gallons= ( y <br /> (Y)tank capacity in gallons= U V <br /> SO%=(X)capacity I(Y)capacity x100 <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 28010 overfill <br /> valves should be set to a maximum of 95%. <br /> 21 <br />