PRINTHEAD MAINTENANCE STATION INCLUDING STATION BACKFLUSH

A maintenance station apparatus for a printhead including a nozzle face with the nozzle face including a nozzle array for jetting a liquid is provided. The maintenance station includes a capping unit including a drain and a waste liquid tank that receives a waste liquid from the capping unit. A valve is in fluid communication with the capping unit through a first fluid passage and in fluid communication with the waste liquid tank through a second fluid passage. The valve includes a first state that permits the waste liquid to flow from the capping unit through the valve to the waste liquid tank and a second state that prevents the waste liquid from flowing from the capping unit through the valve to the waste liquid tank. A cleaning liquid tank is in fluid communication with the valve through a third fluid passage and is configured to provide a cleaning liquid through the valve and into the first fluid passage when the valve is in the second state.