Only 1 Out Of 5 People Get This Plumbing Item Quiz RightShare:FacebookPinterestTwitterMailWhich part stops water to one fixture?40%Next Correct Incorrect A fixture shutoff valve lets a homeowner stop water to a sink or toilet without shutting off the entire home's supply. Which part stops water to one fixture? Trap arm Escutcheon Faucet aerator Shutoff valve 40%