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e 0 71 S6 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,Jtirisdic-. Con (AHJ) and review local, state, and national'codes to determine the regulatory requirements governing shut-off ,capocitY in your region, as well as take into account other considerations such as extreme tank tilt. Take the followirig measurements`with the valve in- stalled in the tank: —-`� Distance from the �1 50 inlet tube flange to the cast i lug in the 71 SO booty (see figures), upper tube length. i Note. the Upper Tube Length must be at least 16" to in- clude the protective bend in the tube. r (D) _ �1 Distance from the 71 SO inlet tube flange to the top and I bottom of lower tube, valve length. (D) (W) = /� Y ?� Upper (U) = L�2 %:u. Tube 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 & 61TPlnodels add 0.6") From the tank calibration chart provided by tank manu- facturer find the dipstick number (Y) which corresponds to the 100% volume, (B) To Tank 1. To determine shut-off percentage: Subtract upper tube length (D) from distance to tank (U) Valve bottom (B) (}(} _ (i3) - (®) - 2" = l� 1fy .�� Z %0 y/.[ Length, top of cut 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 = 500/0 _ (}{) capacity / (Y) capacity X100=14 /I I W5 Kroo = 9Y- I -If t L(q W (W) Valve Length, bottom of cut f� (Y) Tank Chart 100% 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%.