The Pressure Switches are designed for balancing pressure washers hot water systems. As the user demands hot water the pressure switch activates to allow water to flow through the heating coil. The flow switch can indicate to the pump to shut off or to turn on. Some of the general uses are for pump protection, for cooling-circuit protection and alarms for too high or too low flow rates. Vacuum switch are employed to regulate the flow. The switch monitors the temperature and when conditions were right it performs its designed function of closing or opening the switch.