How Often Should I Change the Pipes in My House?

Your home’s plumbing system works hard behind the scenes—carrying fresh water in and flushing waste out, day in and day out. But like anything else in your home, pipes don’t last forever. Over time, they corrode, wear out, or become prone to leaks and breaks, which can lead to costly repairs or water damage.

So how often should you change or replace the pipes in your house? The answer depends on several factors, including the age of your home, the type of piping material used, water quality, and visible signs of deterioration.


Pipe Lifespan by Material

The first thing to consider is what kind of pipes you have. Each type of plumbing pipe has a different life expectancy:

1. Copper Pipes

  • Lifespan: 50 to 70+ years
  • Common Use: Water supply lines
  • Signs of aging: Pinhole leaks, green or blue stains, low water pressure

2. Galvanized Steel Pipes

  • Lifespan: 20 to 50 years
  • Common Use: Used in homes built before the 1960s
  • Signs of aging: Rust-colored water, low pressure, corrosion, leaks

3. Brass Pipes

  • Lifespan: 40 to 70 years
  • Common Use: Water supply lines (less common now)
  • Signs of aging: Leaks, discoloration, metallic taste in water

4. PVC Pipes

  • Lifespan: 25 to 40 years
  • Common Use: Drain, waste, and vent lines
  • Signs of aging: Cracks, leaks, warping

5. PEX Pipes

  • Lifespan: 40 to 50 years
  • Common Use: Modern residential plumbing
  • Signs of aging: Not many early signs—flexible and resistant, but UV exposure can cause failure

6. Cast Iron Pipes

  • Lifespan: 50 to 100 years (for drain lines)
  • Common Use: Sewer lines in older homes
  • Signs of aging: Rust, slow drains, sewage odors, foundation leaks


Age of Your Home Matters

If your home is more than 50 years old and hasn’t had a plumbing overhaul, it’s time to check the pipes. Many older homes were built with galvanized steel or cast iron, which can corrode or crack over time.

If you’ve recently purchased an older home, a plumbing inspection is a must—even if there are no visible problems yet. Preventative replacement is far more affordable than emergency flood repairs due to a burst pipe.


Signs You May Need to Replace Your Pipes

Even if your pipes are technically still within their "lifespan," various environmental and usage factors can cause them to deteriorate faster. Watch for these warning signs:

1. Discolored Water

Brown, red, or yellowish water usually means rust is building up inside your pipes—especially in galvanized steel or iron systems.

2. Low Water Pressure

If your water pressure drops without explanation, corrosion or buildup inside the pipes might be the reason.

3. Frequent Leaks or Pipe Repairs

Needing to patch leaks repeatedly? That’s a red flag that your system is on its last legs.

4. Visible Corrosion or Warping

Look under sinks, in basements, or crawl spaces for visible rust, stains, flaking, or deformed piping.

5. Water Damage on Walls or Ceilings

Mysterious stains, peeling paint, or bulging drywall may indicate a hidden leak in aging pipes.

6. Noisy Pipes

Loud clanging or banging when you turn on the faucet (called "water hammer") could be a sign of worn supports or water pressure issues from failing pipes.


Whole-House Repiping vs. Partial Replacement

If your pipes are approaching the end of their lifespan or causing repeated problems, whole-house repiping may be the most effective solution.

Whole-House Repiping:

  • Replaces all the water supply pipes
  • Ideal for older homes or homes with widespread issues
  • Increases property value and water quality
  • Long-term investment that improves peace of mind

Partial or Spot Replacement:

  • Targets only the damaged section(s)
  • More budget-friendly upfront
  • May be suitable for newer homes with isolated problems
  • Could be a temporary fix if the rest of the system is aging

Tip: If you’re doing a major remodel (like a kitchen or bathroom upgrade), that’s a great time to update the piping as well.


Tips to Extend the Life of Your Pipes

If your plumbing system is still in good condition, here are ways to keep it that way:

  • Install a water softener if you live in an area with hard water (reduces scale buildup)
  • Avoid chemical drain cleaners, which can corrode pipes over time
  • Schedule routine plumbing inspections
  • Keep pipes insulated in cold areas to prevent freezing
  • Fix minor leaks promptly to avoid pressure on the system
  • Use strainers in sinks and showers to prevent clogs


Cost of Pipe Replacement

Costs vary depending on the size of the home, type of pipe material, labor, and accessibility, but here’s a rough idea:

  • Partial replacement: $1,500 – $5,000
  • Whole-house repiping: $6,000 – $15,000+

Copper tends to be more expensive than PEX or PVC, but it offers excellent durability. Always get multiple quotes and make sure the company is licensed and experienced in repiping.


Should You DIY Pipe Replacement?

Small repairs like tightening fittings or changing a visible section of PVC pipe may be manageable for a seasoned DIYer, but full pipe replacement is a job for professionals.

Why?

  • Pipes often run behind walls, ceilings, or under floors
  • Mistakes can cause major water damage or code violations
  • You’ll need permits and inspections
  • Professionals ensure proper fittings, angles, and connections

Pro Tip: Work with a licensed plumber who offers warranties on labor and materials.