Jet pump systems

A pump assembly for creating a jet of water, the pump assembly comprising:

• a first body including:
• a front surface;
• a back surface opposite the front surface;
• at least a portion of a cavity arranged between the front surface of the first body and the back surface of the first body;
• a motor arranged adjacent to the front surface of the first body, the motor comprising:
• a rotor having a shaft extending from the motor and through the first body, the shaft including a substantially single unit of material and having an end arranged adjacent to the back surface of the first body;
• an impeller coupled to the end of the shaft, the impeller including a bearing surface received by a cooperating bearing surface arranged in a second body, the second body arranged adjacent to the back surface of the first body, and wherein the bearing surface of the impeller, and the cooperating bearing surface of the second body, support the impeller rotationally on the shaft such that when the shaft is rotatably displaced by the motor, the impeller displaces the water into the cavity arranged between the front surface of the first body and the back surface of the first body and into the second body to create the jet of water;
• wherein the first body includes a receptacle arranged in the back surface of the first body and communicatively coupled to the cavity arranged between the front surface of the first body and the back surface of the first body, and at least a portion of the impeller is received by the receptacle arranged in the back surface of the first body;
• and
• a plate arranged between the front surface of the first body and the motor arranged adjacent to the front surface of the first body, the plate comprising:
• a through hole for receiving at least a portion of the shaft extending from the motor;
• a sealing surface arranged around the through hole;
• and
• a gasket arranged around the shaft extending from the motor, the gasket to seal an interface between sealing surface of the plate and the motor.