The answer to 'when to replace plumbing repair' is that plumbing repairs should generally be replaced when they are no longer functioning effectively or when they have reached the end of their expected lifespan. Some common signs that it's time to replace a plumbing repair include persistent leaks, reduced water pressure, frequent clogs, or outdated materials that are prone to failure.
Homeowners should regularly inspect their plumbing system and address any issues promptly to prevent further damage. Depending on the type of repair, the expected lifespan can range from 5-10 years for things like faucets and showerheads, to 20-50 years for pipes and other major components. When a repair is no longer working as intended, it's usually best to replace it rather than attempt another temporary fix.