24/7 Emergency Service

Replacing an Old Sewer Line? You Have Options

Many of us are living in our homes longer and longer, while others are buying homes that are at least 25-years old, and often 75 to 100 years old. One thing that comes to the forefront in older homes is the condition of the main sewer line (for homes that aren’t on septic tanks).

Main Sewer Lines 25-years or older, are most likely made out of a material that tends to leak at the joints as it ages. The ‘newer’ plastic pipes that are glued or fitted together with gasketed fittings are much more ‘water tight’ than the older pipe systems that were made out of concrete, clay, cast-iron, cement-asbestos, or different types of bitumen coated piping.

Why do Older Pipe Systems Fail?

As time passes, all piping systems tend to move and settle a little, as rain, freezing, and thawing cause ground heaving and movement. When older systems move, they often start to leak at the fittings. Once a leak starts it can do two things; settle the ground under the pipe so it settles more and leaks more, and/or attract roots because it has become a source of water. If roots find the old system, they wiggle their way into the joints, pushing them apart as they grow, causing the pipe to leak, which causes more settling of the pipe; and it keeps getting worse as time passes. Once roots discover a water-source, they will never abandon it.

Even though roots can be ‘jetted’ out of a pipe, or cut out with cable-type roto-rooter machines, or treated with a ‘root-killer’ product; removing and/or killing roots will not repair the leaking pipe; and it will keep getting worse until the leaking area is repaired or replaced.

How Can I know the Condition of My Sewer Pipe?

The only sure way to determine the condition of your sewer line, is to put a Sewer Camera down the pipe and examine the entire system. It’s best to have this done by a professional who can clean and flush the line out first to get the best possible picture, then camera the line from the house all the way out to the Sewer Main in the street. A good company will do this and also provide you with a copy of the video and explain what they have found. In our area it usually runs $300.00 to $500.00 for the video inspection.

What’s the Best Solution?

If the problem is localized to an area of a few feet, it’s usually best just to dig it up and repair the problem. If there is root penetration into an older sewer line so extensive that the whole sewer line has to be replaced, there are essentially three permanent solutions; dig it up to replace the pipe, install a new pipe with a pipe-bursting system, or install a new liner inside the old pipe.

Trenching and Replacing…

Conventional trenching and replacing the pipe is normally the most intrusive remedy, but sometimes this is the only reasonable solution due to the condition of the pipe and a lack of other options. Generally this is thought to be the ‘least’ expensive way to replace a sewer line. But due to the costs of labor and the restoration of landscaping, driveways, sidewalks etc. caused by trenching, this can actually be the most expensive way to repair the line.

Pipe Bursting Replacement Method…

One of the first ‘Trenchless’ methods to come along for replacing a pipe in the ground (sewer lines, water lines, etc.) was the Pipe Bursting method. With this system, an access hole is needed at both ends of the piping to be replaced, and a small, strong, wire cable is threaded through the length of the pipe. One end is connected to a pulling mechanism, and the other end of the cable has a pointed ‘bursting head’ attached to it and the new pipe is attached behind the bursting head. When the bursting head is pulled through the middle of the old pipe, it breaks and pushes the old pipe out of the way, and the new pipe is dragged into place behind it. This works well enough, but it’s impossible to tell exactly what the burst pipe is pushing up against. For that reason some municipalities won’t allow this type of pipe replacement, because existing utilities close to the ‘burst pipe repair’ were ruined by the system. Often this system is less expensive than installing a new liner in the old pipe, so lots of companies like to promote it as a ‘cheaper’ solution.

Installing a New Liner…

If an old existing pipe is in good enough condition structurally, installing a new liner inside is often the best choice. To install a new pipe-liner in an old sewer pipe, first the pipe must be thoroughly cleaned/cabled/jetted and inspected with a video camera to ensure the pipe can be lined without any problems. A hole is then dug at one end of the pipe being lined to access it properly, and a careful measurement is taken to learn how long the new liner needs to be. Next, a special flexible liner is permeated with a special resin, and the liner is ‘injected’ by air pressure down the whole length of the pipe. Then a kind of ‘balloon’ is inserted into the liner, and it’s blown up with enough air pressure to expand the liner and push it against the sides of the old piping. This inflated balloon is kept in place for several hours until the resin cures. When it’s removed, the old pipe has a new, completely smooth plastic liner inside it that won’t leak and attract any roots. Structurally it’s rated almost the same as a new Schedule-40 plastic sewer pipe, typically an equivalent of Schedule-35 pipe.

On any of the above methods, be sure to read the warranty details carefully, and check the ‘track record’ of the installers you choose. A good company should stand behind their work 100% for at least the 1st year, and cover their labor for 10-years. Most pipe bursting or pipe lining manufacturers warranty their materials and product for 25-50 years. If the warranty is less…be careful.

These days, many municipalities are requiring a camera inspection of the main sewer pipe before a home is sold. And they’re often requiring homeowners to be responsible for sewer lines all the way out under the street to the sewer main, not just to the edge of the property. It pays to be careful and invest in a good quality sewer line inspection from a trustworthy company, who will help you with your choices. If you do need to upgrade your existing sewer main, make sure you consider your choices carefully.

Leave a Reply

Your email address will not be published. Required fields are marked *

Any Trenchless Waste or Water Pipe Replacement $300 Off

Do it right – call Day & Nite

(425) 775-6464

OFFER GOOD ONLY IN OUR SERVICE AREA. Not valid with any other offer. Other restrictions and details may apply. Limited to one coupon per household.

Print Coupon

Save $30 on HVAC Maintenance

Do it right – call Day & Nite

(425) 775-6464

OFFER GOOD ONLY IN OUR SERVICE AREA. Not valid with any other offer. Other restrictions and details may apply. Limited to one coupon per household.

Print Coupon

Save $150 on Tankless Water Heater

Do it right – call Day & Nite

(425) 775-6464

OFFER GOOD ONLY IN OUR SERVICE AREA. Not valid with any other offer. Other restrictions and details may apply. Limited to one coupon per household.

Print Coupon

E. Rubio

I had the privilege to meet Zach on two separate occasions within a two week span. He was upfront and honest about the work that needed to be done. He is a hard-working, dedicated, professional employee of Day and Nite Plumbing. He explained what needed to be done. I asked questions and he was patient and explained things further so that I truly understood.

M. Lindell

Collin was our tech and he was very knowledgeable answered our questions and what they charged was very reasonable and we are very happy to have water again. I was really impressed by everyone that we dealt with they all were professional and helpful.

D. Thomas

We had a great experience with Day and Nite from start to finish. Chris was great at the no obligation consult. He explained things clearly and covered everything but didn’t waste our time. They also provided lots of options and thoroughly explained them but never tried to push or up-sell us. Installation was fast and very professional. We will definitely be using Day and Nite in the future.

D. Lee

The technician was great: he knew exactly what the problem was and fixed it quickly and efficiently. Even when a glitch happened in the repair, he was totally prepared to handle the situation. I will definitely contact Day & Nite Plumbing for future problems. Thank you!

S. Lippold

Outstanding Service! Scheduler was pleasant and receptive. Technician (Collin) communicated well, arrived in the agreed upon time frame, diagnosed the problem and fixed the issue quickly. Previously, we had two other companies misdiagnose the problem and one company stand us up for a scheduled appointment. If we have plumbing issues in the future, Day & Night Plumbing will be our first call !

D. Campbell

Very pleased with the professional technician, Donavan, who came out when our water heater quit working. This was the third major problem with this water heater, so we took his advice and replaced it. Thankfully, he was able to also install the new one right away. I had confidence in his advice and ability to do the job. He was thorough and friendly. It was a five star experience. I highly recommend.

Write a Review