A liquid collection and disposal assembly for collecting and disposing of drainage liquid, the liquid collection and disposal assembly disposable in a pit and having a basin assembly with a collection cavity, a pump suspended in the collection cavity and a level detector to detect drainage liquid levels in the collection cavity. A controller responds to the level detector to activate the pump at predetermined levels of the drainage liquid to evacuate the drainage liquid. A transparent basin cover is supported on top of a basin member, and an effluent discharge pipe is connected to the basin cover and to a liquid outlet port of the pump, thereby supporting the pump a predetermined distance above the bottom of the collection cavity. The pump has a water jacket through which the discharging effluent passes to cool the motor.