MD 220020 003 Water Softener for Boilers

A line drawing schematic of a water softener system for boilers. At the top, there is a series of connected lines and symbols representing components such as isolation valves, pressure gauges, and a 10 Micron feedwater filter. The city water feed enters from the left, indicated by an arrow, and moves through various components such as the feedwater prefilter and duplex softener with a brine tank on the right. At the bottom left is a symbol legend explaining the icons used: a symbol for isolation valve, pressure gauge, and sample port.