First and foremost, we’re a trenchless sewer line and water main replacement and repair company. Our family-owned-and-operated business is committed to serving this Northwestern region of the country, improving your plumbing efficiency with innovative solutions and immediate results. Since 2009, we’ve gone above and beyond for our commercial and municipal clients and look forward to serving you for many more years to come.

Trenchless technology allows us to repair or replace your underground water mains and sewer lines without extensive excavation. Traditional repair and replacement methods require large crews and heavy equipment to dig trenches across your property to gain access to underground infrastructure. That process can be incredibly time consuming and can cause serious damage to your green spaces, driveways, parking lots, landscaping, foundations, and other property features. Repairing the damage, filling in the excavation, and restoring your property can be expensive and frustrating, but trenchless technology eliminates that hassle.

Our trenchless services can access your pipes through a few small and conveniently located holes. The innovative technology we use can inspect, clean, repair, and even replace your water mains and sewer lines non-invasively. The process saves you time and money and is more environmentally friendly than traditional repair and replacement methods. The lack of digging in trenchless repairs and replacements means that any hazardous contaminants in your soil don’t have to be churned up, keeping you free from potential health concerns.

We work hard to stay on top of industry best practices, and we have the most current trenchless technologies, up-to-date equipment, and thoroughly trained technicians. That’s why we can safely and affordably bring these state-of-the-art solutions to the Northwest states.

We are proud to offer full-service trenchless solutions, including:

Sewer camera inspection services: Our state-of-the-art sewer camera inspections are part of our standard services to help our qualified technicians precisely locate problems within your sewer and drain pipes. Through a small access hole, we can send our high-resolution camera into your pipes. At ground level, our talented technicians watch live footage as the camera carefully snakes through your pipes. We use that footage to identify exact locations of corrosion – invading tree roots, blockages, cracks, breaks, or other damage. The footage also helps us determine the condition of your pipes, and the materials of your pipeline. All of the information gathered in the sewer camera inspection can help us determine the best solution for your particular needs.

Trenchless sewer line repair services: Our innovative trenchless sewer line repair services can quickly and less intrusively repair underground piping that is suffering from blockages, leaks, cracks, or other damage.

Cured-in-place pipe services (CIPP): As your pipes age, they become susceptible to invading tree roots, infiltration, and exfiltration. This can cause cracks, breaks, blockages, and other damage within your pipes. Our cured-in-place pipe services (CIPP) can access your damaged pipes through a small hole, and after we’ve inspected and cleaned out your pipes, we can send a saturated pipe liner into your existing pipeline and cure it to the pipeline interior with steamUV lights. Once that liner is completely dried, you are left with a brand new, seamless, long-lasting pipe within the old one.

LED lining services: Our traditional CIPP pipe lining services use heat or UV lights to cure the new liner in place, but our LED lining services use a LED light in the curing process. LED lining is typically used in more complex situations, like with small wastewater pipes, sewer laterals, and other compact spaces. The LED light uses a small amount of energy, cures liners quickly, and doesn’t require any harsh chemicals. For complex projects, LED lining can be an economical, efficient, and environmentally-friendly service. LED lining is a modern technology that not all plumbing companies utilize, but at Allied Trenchless, our honest and friendly technicians are skilled in specialized blue light pipe lining.

Manhole rehabilitation services: Manholes across the Pacific Northwest are quickly aging and deteriorating, but our manhole rehabilitation services can restore manholes without the costly, messy, and disruptive traditional repair methods. One of our manhole rehabilitation options is recoating your existing manholes with materials that structurally improve them. These new interior manhole coatings can extend the useful life of a manhole and improve the integrity of your entire sewer system. Another option is installing trenchless liners. In this process, our knowledgeable technicians can send saturated liners into your existing sewer lines, allow the liners to adhere, and cure them into seamless and durable pipes that structurally reinforce the manholes and help prevent future infiltration and corrosion.

Directional drilling services: Our directional drilling services allow us to install new underground water and sewer pipes without causing major impact to the surrounding area. We can drill a small access hole along a path from one point to another, pull a new pipeline through the hole, and efficiently build a new pipeline without extensive digging.

Slip lining services: Our durable slip lining services offer a cost-effective trenchless rehabilitation method to repair leaks and other structural instabilities to your water mains and sewer lines. We can push a new pipe through your existing pipe, grout the space between the two pipes, seal the ends, and leave you with restored functionality.

Excavation services: Sometimes, excavation is required for a project. If we need excavation to reliably gain direct access to your pipes, we can dig a strategically placed trench. When the repair or replacement project is complete, we will fill in the dirt and leave your property in the best shape possible.

Pipe bursting services: Instead of traditional excavation, our trenchless excavation services can burst your damaged pipes and replace them with new, durable pipes. In this reliable and practical trenchless excavation method, our skilled technicians can dig two small access points, insert a special bursting head with an attached new pipe through one of the holes, and push the bursting head through the old pipe. As the head moves, it can break up the existing pipe and send the pieces deeper into your soil. Once the bursting head moves all the way through the pipeline, a brand-new pipe will be left in its place. We will remove the bursting head through the exit hole and fit the new pipe to your existing system. Then, we will refill the holes and you can immediately use your new pipeline.

We are very proud to offer quality emergency services. We understand that plumbing emergencies can happen at the most inconvenient times, but we don’t want that to stop you from getting the prompt and dependable service you deserve. If you experience a burst pipe, water or sewage backups, or any other type of plumbing emergency, turn to our trusted 24/7 emergency services. Our Allied Trenchless technicians can promptly visit your property to quickly repair urgent issues and get your system back up and running.

There are several factors to consider when determining if your sewer lines should be repaired or replaced. Two critical factors are the age and materials of your pipes. In Washington and its surrounding states, we typically see a lot of older Orangeburg pipes. Orangeburg pipes were popular in the 1940s through the 1970s and are asphalt impregnated paper pipes. Like aging galvanized steel and lead pipes in this area, Orangeburg pipes have reached the end of their useful lives. With these older deteriorating materials, it’s usually more cost effective to do a sewer line replacement.

There are other signs you can watch for that may indicate a sewer line repair or replacement is necessary, including but not limited to:

  • -Slow drains
  • -Water backups
  • -Foul smells
  • -Sagging spots in yards
  • -Extra green or lush places in yard
  • -Foundation cracks, settlement or sink holes
  • -Puddles of brown water
  • -Rodent problems

There are many benefits to commercial and municipal trenchless sewer line and water main repair and replacement, including:

  1. Save Your Time. Trenchless repair and replacement services don’t require a lot of digging, which means we need less time to complete your project. The lack of digging and repairing any subsequent damage caused by excavation can get your sewer and water main functionality restored quicker and get you back to enjoying life without the hassle of pipeline damage.
  2. Save Your Money. The lack of excavation means you don’t have to spend your money on large crews, heavy equipment, and long repair and replacement schedules. Excavation can also cause extensive damage to your green spaces, parking lots, foundations, landscaping, and other property features. All of that damage can be costly to repair, but our non-invasive trenchless services leave your property intact and remove those damage costs from your budget.
  3. Save Your Property. Trenchless repair and replacement services require a few small access holes, which our technicians can dig at conveniently located spots. Not having to dig trenches through your outdoor space protects your property and leaves it untouched.
  4. Helps The Environment. Trenchless services do not require harsh chemicals that can be dangerous to your health, completing your project safely.
  5. Save You Hassle. Trenchless technologies allow our services to be done conveniently and efficiently, so you won’t disrupt your community’s traffic patterns, daily routines, and productivity.


Allied Trenchless is based out of the state of Washington, but our service area extends much further. We have completed jobs in Washington, Oregon, Alaska, Montana, Idaho, and even Guam. Our talented technicians are eager to travel and can visit your property to provide state-of-the-art trenchless repair and replacement solutions no matter where in the world your need is.

Call us to get more information for your specific needs. Quotes are free of cost and no question is too small to ask.

You can learn more about our high-quality trenchless repair and replacement solutions by calling our friendly team or by reaching out through our online contact form. We are more than ready to offer the innovative, affordable, and effective trenchless services to get your project done right.

Call 833-668-7362 or email