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^lorksheetfor OPW E1 SO and 1"SO 5_ /y1�1 7 Appendix B y Z 71 SO Overfill Valve in Tank Shut off Level Worksheet Important: 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 Having Jurisdic- tion (AHJ) 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 following measurements with the valve in- stalled in the tank: Distance from the 71 SO inlet tube flange to the cast lug in the 71 SO body (see figures), upper tube length. Note: the Upper Tube Length must be at least 16" to in- clude the protective bend in the tube. (D) _ r - 5' Distance from the 71 SO inlet tube flange to the top and botto17X e length. (w) _ (U) _ 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 6111 & 61TP models add 0.6") (B)= .r- /'np— From the tank calibration chart provided by tank manu- facturer find the dipstick number m which corresponds to the 100% volume. (Y) _ /// "S-0 - I/ /• 5-4 1. To determine shut-off percentage: Subtract upper tube length (D) from distance to tank bottom (B) — F Y, Using the tank calibration chart provided by the tank manufacturer determine the tank capacity at the cal- culated (X) dimension and the 100% volume (Y) tank capacity. �( (X) tank capacity in gallons (Y) tank capacity in gallons = q0 � 6 3043 SO% _ (X) capacity / (Y) capacity x100 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 B Section 280.20 overfill valves should be set to a maximum of 95%. 21 (D) -'4 Upper Tube (W) Valve Length, bottom of cut (B) To Tank M Tank (U) Valve Length, Chart 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 B Section 280.20 overfill valves should be set to a maximum of 95%. 21