Take a simple test: Try to fill a gallon jug with water in 24 seconds.
If it takes longer, you may have major water-pressure problems due to being clogged and corroded pipes. Or, when taking a shower and a nearby toilet flushes or faucet is turned on, does a surge of hot or cold water occur in the shower? Another sign of clogged water pipes.
Reline your pipes instead of replacing them and save time, money and your walls!