Supplying water at constant pressure for peak demands as well as low flow requirements can be accomplished with standard constant speed pumps without storing large amounts of pressurized water. A Cycle Stop Valve and a small diaphragm tank will do a better job than large pressure tanks and elevated tanks. Large buildings are needed to house them and even in warmer climates, a fenced-in area is required. Large pressure tanks require maintenance. Regular clean outs and expensive corrosion resistant coatings are mandatory.
Air charging equipment for large pressure tanks can be a headache.
Air compressors, air injectors, probes, air relief valves, air volume controls, and sight gauges are a few of the components of the air charging equipment that cause problems and need maintenance. Water in large pressure tanks can become stale. Low water demands can leave water sitting in large pressure tanks for long periods of time. The longer water sits in these tanks the more likely it is to acquire a bad or stale taste. Pump cycling can still be a problem.