Adapter plate for coupling a water treatment controller to a valve body

An adapter plate for coupling a water treatment system controller to a valve body having a retention stop with a cylindrical wall and valve lugs and snaps extending radially outward from the cylindrical wall, the adapter plate comprising:

• a plurality of mounting tabs;
• an outer wall defining a central opening;
• a plurality of retainer lugs extending radially inward from the outer wall;
• a plurality of retention slots extending radially inward from the outer wall;
• and
• a plurality of clearance notches extending radially outward into the outer wall and spaced to align with the snaps of the retention stop;
• wherein when the plurality of clearance notches is aligned with the snaps, each of the plurality of retainer lugs is positioned between a valve lug and a snap permitting the plurality of clearance notches to pass over the snaps and the plurality of retainer lugs to pass between the valve lugs and the snaps as the adapter plate is moved axially onto the cylindrical wall of the retention stop into an engaged position;
• wherein the plurality of retention slots is configured to flex the snaps radially inward as the adapter plate is rotated in a first direction from the engaged position to a seated position in which the snaps seat within the plurality of retention slots;
• and
• wherein the plurality of mounting tabs is configured to mate with connection snaps on the controller to couple the controller to the valve body.