Plunger

The  is a melee weapon found in Fallout Tactics. In Fallout 3, it is useful only as Rock-It Launcher ammunition. Located in toolboxes, toilets and storage rooms across the wasteland.

Fallout 3
Inside the DC ruins hides a room called the Plunger Room of Death. This room is located inside the Shelter and holds multiple plungers, a single Feral Ghoul, and bloody hand prints decorating the walls and ceiling. Video