Things to Look for When Buying a Home: Top Plumbing Tips

When you’re buying a home, don’t neglect the plumbing. Unlike changing the wall color or getting a new appliance, plumbing issues can be a major ordeal. Old, leaky pipes can cause mold growth behind walls, or a clogged sewer line can lead to a nasty backup in your basement. Jason Hawes has more tips for you on what to look for when finding your dream home here!

Luckily, a thorough plumbing inspection can help identify potential problems before you sign the paperwork. If you’re house hunting, you’ll want to know these things to look for when buying a home.

Things to Inspect When Buying a House

Plumbing issues in a house can be expensive to fix. Here are the main things to check when buying a house.

Check for Old or Outdated Pipes

Older homes may have plumbing systems made from outdated or problematic materials. Some pipes are more prone to leaks, corrosion, or water contamination.

So, what type of plumbing is not good in a house? Here are a few examples:

• Lead pipes: Common in homes built before 1986, these pose serious health risks. Exposure to lead can cause developmental issues, especially in children, so these pipes should be replaced immediately.
• Galvanized steel pipes: These were used before the 1960s and corrode over time, reducing water pressure and leaks. Rust buildup inside the pipes can also affect water quality.
• Polybutylene pipes: A flexible plastic used between the 1970s and 1990s, polybutylene pipes degrade due to chlorine exposure and can fail unexpectedly.

To test what types of pipes are in the home, consider the scratch test. Use a coin or key to scratch the pipe:

• If the scratch is shiny and silver, you likely have lead pipes.
• If the scratch is dull gray, you likely have galvanized pipes.
• If the scratch is the same color, you likely have some kind of plastic pipes.

For one final test, if you can stick a magnet to a pipe, then you have galvanized pipes.

You can also check the pipes for signs of aging. For example, you might have low water pressure or discolored water throughout the home. You might even see visible corrosion on exposed piping.

Inspect for Signs of Leaks and Water Damage

Leaks can cause mold growth, rot, and structural damage. Even small leaks can waste thousands of gallons of water each year. Here’s what to look for when touring a home:

• Water stains on ceilings, walls, or under sinks indicate past or active leaks.
• Musty odors may signal hidden leaks and mold growth inside walls or under flooring.
• Warped or soft flooring around sinks, tubs, or toilets suggests water damage.
• Peeling paint or wallpaper may also point to moisture behind walls.
• Visible mold near plumbing fixtures is a red flag for ongoing leaks.

Plumbing leaks don’t just waste water — they can weaken a home’s structure over time. If you spot these warning signs and want to avoid plumbing issues after buying a house, consider a professional plumbing inspection.

Assess Water Heater Age and Condition

A failing water heater can be a major inconvenience and an unexpected expense. Most water heaters last between 8-12 years, so checking the unit’s age is crucial. You can usually find this on the manufacturer’s label.

You’ll also want to check the water heater’s functionality. Look for signs of aging and disrepair:

• Rusty water coming from hot taps suggests internal corrosion, meaning the heater may need replacing soon.
• Loud popping or rumbling sounds indicate excessive sediment buildup, reducing efficiency and lifespan.
• Inconsistent water temperature can signal a failing thermostat or heating element.
• Water pooling around the unit is a sign of a failing tank, requiring immediate attention.

Ensure Proper Drainage and Sewer Line Functionality

Sewer line issues are costly and disruptive to repair. A damaged sewer line can cause backups, slow drains, and foul odors throughout the home. Here is what to look for when buying an older home:

• Multiple slow drains could indicate a blockage in the main sewer line.
• Persistent sewage smells inside or outside the home may suggest a broken or clogged sewer pipe.
• Bubbling or gurgling noises from drains and toilets can indicate a venting or sewer issue.
• Water backing up in sinks, tubs, or toilets is a serious sign of a sewer problem.

One of the best ways to identify hidden sewer problems is with a professional camera inspection. A plumber can insert a camera into the sewer line to check for tree root intrusion, cracked or collapsed pipes, grease buildup, debris, and foreign objects clogging the sewer line. What they find might even help you negotiate a lower home price.

FAQs on Plumbing in Older Homes

What Type of Plumbing Is Not Good in a House?

Lead pipes, galvanized pipes, and polybutylene pipes can all cause problems in a home, so you’ll want to avoid them.

What’s the Best Way to Check for Hidden Leaks?

One effective method is turning off all faucets and appliances, and then checking the water meter. If it moves, there’s a leak. Inspecting walls and ceilings for water stains, peeling paint, or mold growth can also reveal hidden leaks. Listening for continuous running water behind walls may indicate a hidden issue. You can also use food coloring in the toilet tank — if the color appears in the bowl without flushing, you have a leak.

Should I Get a Professional Plumbing Inspection Before Buying a Home?

Yes. A licensed plumber can detect hidden issues, assess pipe conditions, and estimate repair costs. A professional inspection can save you from unexpected and expensive repairs down the road. Some issues may not be visible to the untrained eye, so investing in an inspection can give you peace of mind.

How Much Does it Cost to Replace Plumbing in an Old House?

Plumbing replacement costs depend on house size, pipe material, and labor costs. However, you may be able to negotiate a seller credit if you find out the plumbing is old before closing.

The Importance of Plumbing Inspections for Home Buyers

Checking for plumbing issues before buying a home can prevent costly surprises. The best way to catch all the things to look out for when buying a home is to hire a professional plumber to perform an inspection. An inspection helps you know what repairs may be needed and negotiate the purchase price. It might even save you thousands in long-term repairs.

That’s where Roto-Rooter professionals come in. We’re here to help with every step of the homebuying process, from inspections to plumbing updates. Schedule your inspection today to give yourself peace of mind on your potential home purchase.