Generally speaking, you're going to find that most main sewer lines will only last somewhere between 50 and 100 years before you need to do a main sewer line replacement.
PVC drain pipes are known to last between 25to 40 years, however, with recent advancements, they could possibly last as long as 70 years or more. While PVC pipes don't last as long as metal versions, they're a good choice for homeowners because they don't rust or corrode.
Cost Estimates
As we mentioned earlier, in the state of California, the cost of sewer line replacement can amount to anywhere between $50-$250 per linear foot, with an average of around $150.
Generally speaking, you're going to find that most main sewer lines will only last somewhere between 50 and 100 years before you need to do a main sewer line replacement. You could very well have a broken sewer line on your hands right now and not even realize it.
But when they age or freezing temperatures and serious clogs get in the way, single pipe replacement costs between $149 and $5,800—or $150 and $250 per linear foot. On average, replacing a pipe costs $1,252 for materials and labor.
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.
On average, a small-scale pipe replacement could take anywhere from a few hours to a couple of days. Just a Few Hours: For minor pipe damage or replacement of easily accessible pipe sections, professional plumbers could complete the job in just a few hours.
While it's certainly possible for a homeowner to replace the sewer line from the house to the street, it's not going to be an easy job. It's going to require both knowledge and manpower because it needs to be done right, or it won't work properly.
First, airtight plugs are inserted in order to isolate the section of pipework that's being tested. Using a drain pressure gauge, the pressure is set to 110mm head for 5 minutes. Next, the pressure is adjusted to a 100 mm head reading of the pressure gauge and after 5 minutes any change in head is measured.
Your main drain line rarely needs a complete replacement. Typically, a plumber can repair it without the expense of digging up and replacing the whole line. However, a replacement is warranted if the cast iron or tile pipes have collapsed completely.
Drainage pipes are often made of cast iron or polyvinyl chloride, or PVC. Cast iron will last anywhere from 75-100 years while PVC wins the award for longest-lasting pipe material with an indefinite lifespan.
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.
A whole-home repipe is a misnomer – not every pipe in your home gets replaced during a repipe. In fact, a whole-home repiping only involves your home's hot and cold water supply systems. Your drainage and sewer system are separate projects that aren't involved during a repiping service.
If you're experiencing frequent leaks or notice water stains on your walls, ceilings, or floors, it's a clear sign that your pipes are compromised and in need of replacement. Ignoring leaks can lead to costly water damage and mold growth, making repiping a proactive solution to protect your property.
Homeowners insurance typically does not cover pipe replacement if the damage is due to gradual wear and tear, corrosion, or lack of maintenance. However, if the pipes are damaged by a sudden and accidental event, such as a burst pipe caused by freezing, homeowners insurance may cover the cost of repairs or replacement.
Pipe Material
Regardless of the material, each of these plumbing products have a life span that you should know so you can gauge whether you need an upgrade. Brass, cast iron, and galvanized steel have a life span of 80 to 100 years, copper lasts 70 to 80 years, and PVC piping only survives for 24 to 50 years.
This typically costs between $8,000 and $12,000 for an average-sized home. Make sure to ask for a detailed estimate from your plumber so you know what's included in the price. Get deeper insights on comparison of detailed and preliminary estimates in our guide.
Recurring Clogs in Your Plumbing System
Recurring clogs in your home's plumbing system are a telltale sign that your sewer line needs replacing. While clogged pipes are commonplace and usually easily solved with standard plumbing solutions, frequent blockages usually indicate a more serious underlying problem.
Expert Recommendations for Sewer Line Cleaning
We recommend homeowners schedule sewer line cleaning every 18 to 24 months to prevent buildup and clogs. Regular cleanings help avoid costly repairs and extend the life of your plumbing system.
Sewer work is expensive because of the labor-intensive process involved, which includes excavation, pipe removal, and installation of a new one. It requires significant manual labor and expertise, driving up the overall cost.