Is relining cast iron pipes worth it?

Author: Leatha Pouros  |  Last update: Monday, October 6, 2025

Fortunately, pipe lining offers a cost-effective, non-invasive solution to rehabilitate these aging pipes. By eliminating cracks and leaks and preventing the escape of sewage gases, pipe lining can ensure that your sewer system functions effectively and keeps your property odor-free.

What are the disadvantages of pipe relining?

Cons of Spray-in-Place Pipe Lining
  • Large diameter pipes are less serviceable with this method.
  • Repairs are permanent, so any additional leaks or damage may require replacement.
  • May constrict water flow, resulting in potential issues elsewhere in the system.
  • Delaminating is a concern since epoxy shrinks during curing.

How long does cast iron pipe lining last?

If properly maintained, CIPP lining can last for fifty to sixty years. Without being cured, has a ten to fifteen-year lifespan on its own. This is due to the possibility of the liner slipping and becoming unstable.

How much does it cost to reline cast iron pipes?

Trenchless Pipe Lining: The cast iron pipe replacement cost using trenchless pipe lining typically ranges from $125 to $175 per linear foot. This means total costs can range from $8,500 to $15,000 for most homes, depending on the length and condition of the pipes.

Is it better to reline or replace pipes?

Replacement is better than relining unless the damaged pipe is under your house's slab. I'm not knocking relining, a quality liner install is almost as good if the pipes aren't too far gone, but replacement is way cheaper as long as it doesn't involve a remodel.

Pipe Problems? Discover the Pros and Cons of Relining vs. Rebuilding

Can you reline a cast iron pipe?

Cast iron pipe relining involves a series of carefully executed steps to ensure a successful and durable result. The process typically begins with the thorough cleaning of the existing pipe using hydro-jetting or other effective methods.

Why is repiping so expensive?

Large homes have more plumbing fixtures and require longer runs for pipes and drain lines, so they cost more to repipe. Additionally, multistory homes cost more to repipe than single-story homes because you'll need more piping material to reach plumbing fixtures between floors.

What is the life expectancy of cast iron pipes?

Cast iron pipes, despite their durability, aren't invincible. Most last anywhere from 50 to 100 years, but issues can crop up much earlier. Homeowners sometimes need to replace pipes before 50 years, especially if tough conditions have exposed them.

Does insurance cover cast iron pipe replacement?

Does Insurance Cover Cast Iron Pipes? In general cast iron damages should be covered by your insurance. However, many residents are finding that their insurance companies are not covering costs related to water damage due to corroded plumbing.

What size pipes can be relined?

Pipes smaller than 40mm are generally not suitable for relining because the liner material, once cured, would overly restrict water flow. However, pipes up to 225mm like some larger stormwater drains may still be candidates for this trenchless solution.

Should I buy a house with cast iron pipes?

It all depends on the geographic location of the home and the pipes. While homes with cast iron pipes laid in clay soil tend to be more likely to have corrosion, homes built in sandy soil often have pipes that last longer. Cast iron is durable and strong.

How long does pipe relining take to cure?

The curing process usually takes a few hours, during which the epoxy resin hardens, creating a new, durable pipe within the old one. The result is a fully restored pipe that is structurally sound and resistant to future damage.

Why is cast iron pipe not used anymore?

Why is cast iron pipe not used anymore? Due to their heavy nature and propensity for clogging and corrosion, cast iron sewer pipes have fallen out of favor and are largely supplanted by PVC or ABS pipes.

How many times can you reline a pipe?

In addition, with CIPP, pipes can be relined more than once if needed. However, the chances of needing to are slim due to long-lasting effects that prevent failures.

What is the difference between pipe bursting and relining?

Pipe bursting provides you with a completely new line, while pipe lining only addresses the flaws present in the pipes. Overall, pipe bursting offers better results than pipe lining in the long run. However, if cost is an issue or the issues are minor, pipe lining is enough to restore your line to good working order.

What is the major disadvantage of cast iron pipe?

Prone to Rust and Deterioration

The main drawback to cast iron piping is that it can rust over time when exposed to damp subterranean conditions. If not properly and regularly maintained, a cast iron pipe may rust to the point that it develops holes and begins to leak.

How much does it cost to reline a cast iron pipe?

So you've had a pipe video inspection done and the plumbers say that your cast iron pipe have to be replaced. Then you did some research and found out by pipe lining and that it could save you a lot of money. The question is how much money? Under houses pipe relining can range from $100 to $300 per linear foot .

Should I replace all cast iron pipes?

Should You Repair or Replace Cast Iron Drain Pipes? Because cast iron piping was only designed to last 50 years, it's best to replace your pipes sooner rather than later if you start to see deterioration. Many factors lead to the breakdown of cast iron pipes.

Can a crack in a cast iron pipe be repaired?

Pinhole leaks, cracks, and even some larger holes in cast iron can be patched using epoxy or a combination of epoxy and waterproof repair tape, depending on the severity of the damage.

When did houses stop using cast iron pipes?

In 1980, cast iron pipes were no longer the pipe of choice. Builders and plumbers replaced cast iron with rigid PVC (Polyvinyl Chloride plastic), which is easier to make, can be made quickly, is harder than other options, and has greater tensile strength. It is essentially a cheaper, faster alternative to cast iron.

How to tell if cast iron pipe is bad?

7 Signs You Should Replace Cast Iron Pipes | Plumber in Sugar...
  1. Leak in the Pipes. Leaks are common in American homes, but they should not worry you if they happen once or twice in a long time. ...
  2. Strange Water Color. ...
  3. Foul Odor. ...
  4. Growth of Mold. ...
  5. Sewage Backups. ...
  6. Sudden Green Patches. ...
  7. Damaged Structural Foundations.

Will vinegar damage cast iron pipes?

The answer is that vinegar will not harm your pipes if used in small doses as recommended in many of the recipes that you find online. No matter what your pipes are made of, pex, pvc, copper, etc. Vinegar will not harm your water pipes.

How much to repipe a 2000 sq ft house?

The cost to repipe a 2000 sq ft house is between $3,500-$15,000 on average. Some variables that will affect the total cost of the job are the size of the house, the ease of access to the pipes, the material that is used, and if any other plumbing work needs to be done.

What is the alternative to repiping a house?

Nowadays, the epoxy lining method or technique has become a quick and economical alternative to repiping your plumbing.

How do I prepare my house for repiping?

How Should I Prepare For A Whole-House Pipe Replacement?
  1. Clearing the Work Area. Plumbers will need easy access to pipes, often in walls, floors, and ceilings throughout your house. ...
  2. Planning for Water Shutdowns. ...
  3. Protecting Your Belongings. ...
  4. Preparing for contingencies.

Previous article
Do you need a permit to insulate a garage?
Next article
How to get sticky residue off wall without damaging paint?