Many homeowners will wait to invest in a plumbing repipe until after they’ve experienced a pipe leak or burst that causes significant (and costly) damage. To avoid expensive repairs, it’s important to know when to replace your water lines. Here are some signs that you need a repipe: Your water pressure is low or decreasing.  There is a change in the taste or smell of your water.  You notice discoloration in your sinks or bathtubs.  Your home is over 50 years old and has not been repiped. The water is reddish brown or full of flakes.  You’ve needed multiple repairs in the last year. Your pipes are noisy or clunky.  The pipes are visibly corroded.