A spray system and method for testing the flow rate of individual nozzles in the spray system are disclosed. The spray system can include a spray tank for holding a fluid to be sprayed, a pump in fluid communication with the spray tank, a manifold in fluid communication with the pump, a plurality of spray nozzles in fluid communication with the manifold, a main flow meter located in a first branch line in fluid communication with the pump and the manifold, a nozzle check flow meter located in a second branch line in fluid communication with the pump and the manifold, and a valve assembly for operating the spray system between a normal operation mode and a nozzle test mode, wherein in the normal operation mode, the valve assembly directs flow to the main flow meter, wherein in the nozzle test mode, the valve assembly directs flow to the nozzle check flow meter.