Old plumbing usually means problems, especially if the fixtures have not been repaired before. The top two plumbing concerns are most present in old houses.
To perform a quick test on an old house, turn on the hot water. If the pressure is low, the galvanized pipes have probably corroded and clogged up. Hot water pipes are often the first to go.
When galvanized piping is in poor condition, expert would often advise people to replace the entire piping system. However, this is often expensive, and homeowners usually opt for the more economical, halfway fix—only repairing the single pipe that is immediate problem.
Worse, the bad galvanized pipe may have been replaced with more galvanized pipe, instead of plastic or copper pipe. In this case, the problem would just be extended, not cured. If your house has a crawl space and you’re fine with going into it, you can get a better picture of the status of your plumbing system.