She is first seen when her nozzle sprayer son Squirt helps her unscrew something stuck on her end. Before the gang leaves to go to Mars, she fills up Robbie's bottle and tells them to make sure he drinks plenty of water, and also tell him she said hi. Near the end of the film, when she notices Squirt dripping, she thinks he's crying, but he tells her that he actually needs a new washer. She then tells him that maybe Santa will bring him one.
Farrah Fawcett, Faucet's voice actress, is the real-life mother of Squirt's voice actor Redmond O'Neal.