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T3 - 91 A p P9 nidi)c 0 71 SO Overfill Valve In Tank Shut off heves Worksheet im[ooetant: This is meant to be supplemental worksheet and not a substitute to following the installation manual instructions. All length measurements are in inches. please contact the Authority.hlaving.Jurlsdic-. tion (AI -IJ) and review local, state, and national'codes to determine the regulatory requirements governing shut-off .capacity in your region, as well as take Into account other considerations such as extreme tank tilt. Take the foliowirjg M6n ursmerits with the valve in- stalled in the tank: Distance from the 7150 inlet tube flange to the cast ling in the 71 SO body (see figures), upper tube length, Note: the Upper Tube Length must be at least 16" to in.. dude the protective bend in the tube. Distance from the 7150 inlet tube flange to the top and bottom of lower tube, valve length. (w) (U)_�.r Distance from the .71 SO inlet tube flange to the bottom of the tank, Note: If a tank bottom protector is present it may be necessary to add this thickness to dimension (OPW 61111&�611TP models add 0,6") (g) �..._ From the tank calibration chart provided by tank manu- facturer find the dipstick number (Y) which corresponds to the 100% volume. (Y) _ _ l ? 7 3/y " 1. To determine sheat -off percentage: Subtract upper tube length (D) from distance to tank bottom (B) 21) _ Z : MY � Using the tank calibration chart provided by the tanic manufacturer determine the tank capaicity at the cal- culated ()) dimension and the 100% volume (Y) tank capacity. (X) tank capacity in gallons = / i 9 d (Y) tank capacity In gallons SO% _ ()0 capacity / (Y) capacity x100 = g Y. Y 111-10 —X/005: IITK4 (p) Upper Tube (B) To Tank E(W) Valve 1 Length, s bottom of cut . ff' a c� (Y) 4 Tank (U) Valve _. _ Chart Length, 100% top of cut volume Dipstick Note: The overfill valve must be installed per AHJ require- ments and all applicable local, state, and national codes, If the overfill valve Is set above the allowable shut-off percent- age the overfill valve must be removed and replaced, For reference 40 CFR part 280 Subpart 6 Section 280,20 overfill valves should be set to a maximum of 95%.