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installed on the fill pipe below the spill container to provide a true sealing for the drop <br /> tube flange on the 61 SO-EVR overfill prevention valve. The 61 SO-EVR series valve is <br /> installed in the base of the OPW EVR spill container with the patent pending 61JSK jack <br /> screw device. This configuration allows liquid in the spill container to be drained <br /> directly into the drop tube thereby isolating the drain valve from the tank ullage, <br /> eliminating a notorious leak point in previous systems. <br /> Table of Contents: <br /> 1. Features <br /> 2. Ordering Specifications <br /> 3. Replacement Parts <br /> 4. Dimensions <br />