Ice maker appliance with plumb-in structure

An ice maker appliance, the ice maker appliance comprising:

• an ice engine comprising a water supply opening;
• a reservoir comprising a body, the body comprising a side wall and a base wall, wherein a supply inlet opening, and an ice engine supply opening are formed through the body, and wherein the body forms a receiving plenum at which water is received from the supply inlet opening;
• a water level sensor configured to determine a water height at the reservoir;
• a water supply conduit fluidly coupling the reservoir to the ice engine, wherein the water supply conduit fluidly couples from the ice engine supply opening to the water supply opening;
• a water filter positioned at the reservoir, the water filter positioned fluidly upstream of a drain opening, the ice engine supply opening, or both;
• and
• a reservoir supply conduit fluidly coupling the reservoir to a main water supply and a flow control device, wherein the flow control device is operably coupled to the water level sensor to selectively permit flow of water through the reservoir supply conduit to the reservoir based on the water height at the reservoir.