If the companies provide warranties for the plumbing products likes plumbing fixtures, faucets, tubs, and sinks, you can claim it when the products get broken before the specified period of time. Make sure that the plumbing contractor that you are hiring gives you the warranty for their service. So that when there is a leakage or face a problem due to a loose valve fitting, you can call the plumbing service and ask for a free service if they provide warranty for their service which covers a specific period of time.