The pump controller activates the pump when the water line drops to low when the water line returns to the right level, the controller turns the pump off, preventing flooding. Enter your contact details below and we’ll call you back. Plungers with a flat cup are best suited for sinks those with a funnel or cone extending from bottom of the cup are more effective on toilets. Culvert cleared of 400 tonnes of debris to prevent flooding. Superb drain treatment and cleaner. Subscribe to our newsletter.