The Waterworks is a location in Luigi's Mansion 3. It is found in the Boilerworks on the second basement floor of The Last Resort, located east of the Elevator Hall and west of the Reservoir. The room's lower level can also be accessed from the Old Reservoir.
When Luigi initially visits the Waterworks, he is forced to fight a Goob with a spanner and a Goob wearing a metal bucket. Luigi must then send Gooigi through the pipe entrance and turn the valves to adjust the water on the lower level and thus allow Gooigi to flash an area with the Strobulb, thus allowing access to the Reservoir. Luigi eventually returns here to look for a Toad searching for the Super Suction component, where he is forced to fight two Goobs and two Oozers to advance to the Waterworks. After finding the Toad, a sleeping Hammer blocks the door to the Reservoir, preventing access between the rooms. To remove said Hammer, Luigi must access the lower level of the room and send Gooigi to attack the Hammer.
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