The cottage has electricity but no 'indoor plumbing'. [=the cottage does not have a toilet or sink; there are no pipes that supply clean water to the cottage]
a store that sells 'plumbing fixtures' [=sinks, toilets, faucets, etc.]
a scientist who spent her life 'plumbing' the minds of criminals
(..) this door, I will have no... alternative but to break it down. Very well. Guy, you're all wet. There was a defect in my plumbing. Lady Litton, listen to me. I have- I have deceived you. I am not Guy Gadbois. I am Inspector Clouseau of the Sureté, (..)1975 The Return of the Pink Panther