What is a boil advisory, and does my plumbing need anything afterward?

A boil advisory means your water provider or public health authority has issued instructions about treating water before certain uses. Follow that specific notice for drinking, cooking, brushing teeth and other household tasks; ordinary household filters may not make unsafe water safe. Keep following the advisory until the issuing authority officially lifts it. When it ends, check whether the utility provides instructions for flushing household fixtures, replacing filters or dealing with ice makers. Those steps vary with the event and your equipment, so there is no one-size-fits-all plumbing procedure. If water remains discolored or pressure changes afterward, contact the provider and ask a plumber to evaluate your home's piping.