Submersible pumps  maintain the wastewater flow throughout the piping systems. These pumps have protective seals preventing any leakage as their shafts rotate at high speeds to maintain the flow of water.  Each seal requires only a minimal amount of water to cool and lubricate the seals and rotating shaft, as well as flushing out any impurities.  Frequently, systems use too much water, a needless expense.  But glass rotameters can be used, due to their adjustable valves and metering tubes, to save cost and maximize uptime.  Check out this article from Brooks Instruments to learn more!