Sewer B

The Sewer B 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 Sewer A and south of Sewer C.

At the south end, there is a platform that rises when a chain is pulled. Luigi or Gooigi can pull on a chain, while the other rides the platform to where they can vacuum to get the green gem. The water must be drained before doing this.

When Luigi and Toad enter this room, Mini Goobs will appear.