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50+ reviews with an average of 4.6 stars

Trenchless Repair and Replacement

Raymark uses trenchless technology to repair and replace sewer lines. In fact, Raymark was the first company in Seattle to use this technology on residential side sewers. We are the experts in trenchless capabilities.

Traditional Method

The traditional method to repair a sewer line usually involves several steps:

  • First, excavate 3’ to 12’ down and dig a trench to expose the pipe.
  • Next, support the dirt walls so they will not collapse onto a worker, or onto the exposed pipe.
  • And finally, begin work on the sewer pipe (and hope it does not rain).

Further complications might include a sewer line running underneath a driveway, or under a structure built after the sewer line was first installed. As a result, digging up the line disrupted the homeowner’s gardens, structures, and outdoor activities.

New Technology

Now, with this new specialized trenchless technology, only a small amount of digging is required. And usually, one or two access holes are needed. As a result, driveways, rockeries, and the Accessory Dwelling Unit built over the existing sewer line are protected.

Types of Trenchless

There are three types of trenchless technology for sewers: pipe bursting, pipe lining, and directional boring.

    1. Pipe bursting means a new pipe is pulled into the damaged pipe via a cable. Then the old pipe fractures and bursts the old pipe outward.
      • Pipe bursting is possible if the existing pipe has collapsed, and there is sufficient room to drag a cable through the old pipe.
    2. In pipe lining, a resin-coated tube is pulled into the damaged pipe and then inflated. The resin soon hardens, creating a pipe within a pipe that is joint-less and corrosion resistant.
      • This method slightly reduces the diameter of the pipe, but does not compromise the pipes efficiency.
      • Pipe lining may not be possible if the existing pipe has collapsed.
    1. Directional boring is used when the existing line cannot be salvaged and a new sewer line is needed. It is also used where a sewer line does not exist.

All three trenchless types are more durable than traditional methods.  Equally important, trenchless costs vary based on the soil type, the materials used, and the depth and length of the sewer line.


  • Our specialists begin the trenchless process with a video inspection of your sewer line. We note the condition of the line and any immediate concerns including breaks, bellies, collapses or clogs.  Let us know if backups regularly occur and the history of your line.
  • The video technician sends the scope to our Sewer estimator. The estimator provides a quote to repair the problem and in most cases can offer multiple options. In addition, we address any questions the homeowner may have.
  • We schedule the work on a date convenient to you. Then, our experienced and efficient utility crew performs the work.
  • After the work is complete, our goal is to leave the site better than we found it.

Call Raymark

Call the experienced professionals at Raymark at 206-430-1954. Our experts will give you an estimate to repair or replace your sewer line, and answer your questions about trenchless methods. Visit our Sewer Repair and Replacement page for more information.

Trenchless technology is also available for water lines.  See our Water Lines page for more information.

Schedule your Raymark appointment today by calling 206-430-1954 or complete our Contact form.

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Trenchless FAQs

  • What does trenchless mean?

    Trenchless is a method of replacing a buried line without digging a large hole or a trench in the ground.

    Hole and trench digging used to be the only way sewer line work could be performed. It often disrupted customer’s lawns, gardens, pools, patios, and other permanent fixtures on a property.

  • Does trenchless last longer than another way of replacing sewer pipes?

    Trenchless is a more durable method of replacing a side sewer line because of the materials used. The trenchless materials include resins and heavy duty plastics which are water tight, non-jointed, and discourage tree roots.

    The trenchless technology is about 10 years old, so there is little data on longevity, but we expect the materials to last much longer than traditional clay and concrete pipes.

Why Raymark Plumbing and Sewer for Trenchless?

price tag

Honest, Upfront Pricing


100% Workmanship Guarantee


Emergency Plumbing Services

service truck

Respectful, Expert Professionals


5 stars

Fast and friendly service. Highly recommended.

Dax Lang 2019 Google Review

Highly recommended

5 stars

Service was great, as always. About to call to set up appt for follow up phase that Jose pointed out.

B. Lakshmi 2019 email

Service Was Great

5 stars

Called on a holiday morning with a toilet crisis (it WAS a crisis because we only have one, and it was completely clogged) – Joe promptly came out and remedied the situation within the hour. Expected a long wait and a hefty bill but no such case. Joe additionally advised us to replace our old, inefficient toilet sometime in the future. Not the first time we’ve called Raymark and won’t be the last.

B. Lorette 2019 Google Review

Promptly Came

5 stars

Jose was awesome: gave my kitchen faucet a quick temporary fix while I got a new fixture, and then installed the new one perfectly. Brittany (in the office) made sure Jose got here as soon as possible!

J. Rigby 2019 Google Review


5 stars

Excellent same day service. Very friendly plumbers and office staff. Recommended to a friend the very next week.

Marion M. 2018 BBB Review


5 stars

Raymark has done several jobs for me. Ty was out today to clear a blocked kitchen line, and did a great job explaining the options, costs etc.

Todd C . 2018 BBB Review

A Great Job

5 stars

Truly excellent service; timely and very professional.

Jeff S. 2018 BBB Review

Truly Excellent

5 stars

Jose was the BEST! He was able to fix our issue quickly and cleanly.

Janeen M.  2018 BBB Review

The Best

5 stars

Hayden and his team were fantastic. Fast, high-quality work at an affordable price. They have a lot of experience dealing with older buildings, and I would highly recommend Raymark for anyone living in a building or home with older pipes.

Ann L. 2018 Facebook


5 stars

Raymark has helped me with all of my plumbing needs for the last 30+ years. They are wonderful to work with, very responsive and always able to assess the problem quickly and determine the best solution at a reasonable price.

Sheila Frawley 2018 Google Review

Very Responsive

5 stars

They did an excellent job. Work was completed on time at the price quoted. We were kept up to date at each step of the way.

Craig H. 2018 Review Buzz

Excellent Job

5 stars

Dion did a great job and was professional and friendly.

Marc M. 2018 Review Buzz

Professional and friendly

5 stars

Jose with Raymark Plumbing was very professional, clear in how he planned to fix the issue, and upfront about what the cost was going to be. Overall, the experience was very pleasant and I wouldn’t hesitate to use Raymark again in the future. Thank you!

Weston Manzer 2018 Google Review

Experience was very pleasant

5 stars

Ty and his assistant did a great job replacing pipes under our kitchen sink and attaching earthquake straps to the hot water tank. Ty was very patient in explaining the position of the straps. I would ask for him again in a heartbeat…. They were on time and finished very quickly.

Kathleen Fellstrom 2018 Google Review

Very Patient

5 stars

Had a clog that was filling up my basement. The guys at Raymark found the problem and replaced the pipe. After the pipe was replaced they made sure the rest of the plumbing was in working condition. Their attitudes were great and they worked hard. Very satisfied customer.

Joyce M. 2018 Review Buzz

Very satisfied customer

5 stars

Personnel were very warm and professional, and plumbers did a great job with both explaining and showing what they were doing. They addressed all concerns and were prompt in getting back to me. It was a big job, new sewer pipe put in from the house to the street.

Lois H. 2018 Review Buzz

Warm and professional

5 stars

Excellent workers. On time, well prepared, knowledgeable and efficient.

Dan Dawkins 2018 Review Buzz

Knowledgeable and efficient

5 stars

I can’t say enough great things about Raymark! Wonderful, friendly service. And they just replaced my business hot water heater on a Friday evening. Thank you!!

Ann D. 2018 Review Buzz

Wonderful, friendly service

5 stars

Good morning, Raymark. Thanks, Anthony, for sending Dan to the rescue last week. We hadn’t been struck by an earthquake under our kitchen sink after all. Dan tightened the wobbly faucet, as well as its companion spouts, then wrestled the obstinate spray hose into line. Ingenious, he cobbled a defense so the hose could avoid tangling in the pipes. Dan is genial, and we really appreciate his visit.

Sincerely yours,
Sharon Raymark-is-my-plumber K. 2018