Patent attributes
An expandable solenoid system having a sequence controller assembly and at least two zone expander solenoid valve assemblies fastened in a staggered configuration. Each zone expander solenoid valve assembly has a zone expander solenoid and a flanged valve body assembly. The valve block has threaded bolt holes, unthreaded bolt holes, an output port, and a threaded pressure source port having an O-ring groove. The threaded bolt holes and the unthreaded bolt holes have different depths and are alternately positioned around a perimeter of the valve block. The first flanged valve body assembly is fastened to the second flanged valve body assembly and so on, in a staggered configuration, whereby respective zone expander solenoids are in a zigzag geometry and creating an expandable manifold.