EASY TO USE - CONSISTENT READINGS Simply attach the SPS Kit over the end of the probe, connect the 1/4in supply line to a small pump such as a Neptune PMUP, or SICCE 90 GPH Micra, or even an open port on your manifold. The SPS Kit is carefully designed to create just the right amount of water movement and positive pressure around the tip of the probe to provide a consistent and reliable reading. It will also actively shield the probe from micro bubbles and debris by preventing them from getting in.