An injection system for adding a liquid, such as a pesticide or mosquito control formula, to a sprinkler system is disclosed. The injection system includes a tank and a pump. The pump may be powered only by a low-voltage connection to the sprinkler systems timer. The pump may use a suction hose to draw piqued out of the tank. An outlet on the pump may be connected to a forked hose. One side of the fork may be a return hose for recirculating the contents of the tank. The other side of the fork may be a discharge connection hose for connecting to the sprinkler system. The discharge connection hose can further comprise an injector fitting.
