The Hidden Plumbing Problems That Can Kill A Home Sale

A property can appear move-in ready on the surface, but serious plumbing issues often lurk behind walls or under floors. These unseen problems are some of the most common deal breakers during home inspections. Buyers want assurance that a home’s systems are in good condition, and plumbing defects can raise red flags about long-term costs or potential damage.

Old or Failing Pipes

Galvanized steel and polybutylene pipes are still present in many older homes. These materials are prone to corrosion and cracking, especially if they have reached the end of their service life. Replacing outdated pipes can cost thousands of dollars, which many buyers are unwilling to accept post-offer. Even if a pipe hasn’t failed yet, visible signs of rust or mineral buildup at joints can be enough to delay or derail a transaction.

Hidden Leaks and Water Damage

Not all leaks are obvious. A slow drip behind a wall or under a sink can cause mold, weaken structural supports, and damage finishes over time. Buyers are wary of stains on ceilings, warped flooring, or musty odors. These symptoms often signal past or active water intrusion, even if the source is temporarily repaired. A professional inspection will typically uncover the issue, leading to repair demands or lower offers.

Sewer Line Issues

Sewer problems are one of the most expensive plumbing failures. Tree roots, ground shifts, or outdated clay piping can lead to backups or total system failure. Buyers who see signs like slow drains, recurring clogs, or sewage smells may request a video scope of the sewer line. If problems are confirmed, the cost of repair or replacement can stall negotiations.

Addressing these plumbing risks before listing a home can help sellers avoid surprises and protect property value. For more information on addressing these possible issues, check out the infographic below.