A dishwasher appliance with a tub that defines a wash chamber is provided. A bottom wall of the tub defines a volute. An impeller is positioned within the volute of the bottom wall, and a motor mounted to the tub at the bottom wall of the tub. The motor is coupled to the impeller such that the motor selectively rotates the impeller within the volute of the bottom wall. A related method for forming a unitary tub for a dishwasher appliance is also provided.

An automatic dishwasher with a tub that at least partially defines a treating chamber, a liquid spraying system that supplies liquid to the treating chamber, and a pump assembly that fluidly couples the treating chamber to the liquid spraying system and where the pump assembly includes a housing having an inlet, a recirculation outlet, and a drain outlet.

An automatic dishwasher with a tub that at least partially defines a treating chamber, a liquid spraying system that supplies liquid to the treating chamber, and a pump assembly that fluidly couples the treating chamber to the liquid spraying system and where the pump assembly includes a housing having an inlet, a recirculation outlet, and a drain outlet.

Disclosed is a dishwasher including: a washing tub in which a rack on which a washing object is seated is disposed; a spray tube which has a rotation shaft extending in a direction intersecting upper and lower shafts, and has a spray nozzle disposed therein to eject flowing washing water in a direction intersecting the rotation shaft; a power applying device that generates power; and a driving module connected to the spray tube so that the power generated by the power applying device is transmitted to the spray tube, wherein the driving module includes: a rotation body which is connected to the power applying device; a pendulum body extending from the spray tube in a direction intersecting the rotation shaft; and a conversion link connected to the rotation body and the pendulum body to convert rotational motion of the rotation body into pendulum motion of the pendulum body.

Disclosed is a dishwasher including: a washing tub in which a rack on which a washing object is seated is disposed; a spray tube which has a rotation shaft extending in a direction intersecting upper and lower shafts, and has a spray nozzle disposed therein to eject flowing washing water in a direction intersecting the rotation shaft; a power applying device that generates power; and a driving module connected to the spray tube so that the power generated by the power applying device is transmitted to the spray tube, wherein the driving module includes: a rotation body which is connected to the power applying device; a pendulum body extending from the spray tube in a direction intersecting the rotation shaft; and a conversion link connected to the rotation body and the pendulum body to convert rotational motion of the rotation body into pendulum motion of the pendulum body.