Abstract: A submersible pump apparatus for admitting air into the low pressure vortex area of the pump to control the amount of liquid material discharged, and including an improved vent and spray system for venting air from the impeller and for directing liquid material onto the pump motor exterior for cooling.

Abstract: A submersible pump apparatus including a fluid distribution system for injection of fluids into one or more areas adjacent the pump. In one embodiment an apertured ring directs water downwardly onto the motor case for cooling the pump, permitting the pump to run in an unsubmerged condition and thereby pump down to a lower fluid level, and stripping away debris, grease, and other unwanted material collections. Another apertured ring can be used to spray water upwardly against the motor case or against any surrounding sump walls to roil and mix the material to be pumped, such as in sewage, chemical, or industrial waste applications. The apertured ring may carry fluid for floating away accumulated grease or debris on the motor case, or may be used to apply foam or carbon dioxide to the pump in the event of a fire.