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Top-Rated Sewer main install, replace or repairers in Merrimack - Updated Nov 2026

Avatar for Ferris Plumbing, Heating & Air
Ferris Plumbing, Heating & Air
4.9(
58
)
Sewer Main - Install, Replace or Repair

Serving Merrimack, NH and surrounding areas

Approved

In business since 2020

Free estimates

Emergency services offered

"Very quick to respond and fixed the problem for a reasonable price."
Various Remodel Jobs
Various Remodel Jobs
Various Remodel Jobs
Various Remodel Jobs
Various Remodel Jobs

+24

37 neighbors recently requested a quote
Recommended by78%of homeowners
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Avatar for Sila Heating, Cooling, Plumbing and Electrical
Sila Heating, Cooling, Plumbing and Electrical
4.5(
5,404
)
Sewer Main - Install, Replace or Repair

Serving Merrimack, NH and surrounding areas

Approved

In business since 1989

Free estimates

Emergency services offered

Live Your Most Comfortable Life with a Company You Trust. \nWe offer Same Day Service and Next Day Installation! \n \nSila has been the center of delighting homeowners since 1989, with our team of engineers, certified technicians, and system designers that are proud to deliver the highest level of expertise in the HVAC industry. Whether it?s a repair, replacement, installation, or service, we have an unwavering commitment to keeping you and your family comfortable and safe ? season after season. \nWe guarantee satisfaction and are proud to have earned over 7,000 ?A? ratings on Angie?s List and its prestigious Super Service Award!

Additional Photos
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Additional Photos

+6

65 neighbors recently requested a quote
Recommended by89%of homeowners
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Avatar for Barrington Solutions Plumbing & Heating LLC
Barrington Solutions Plumbing & Heating LLC
4.9(
17
)
Sewer Main - Install, Replace or Repair

Serving Merrimack, NH and surrounding areas

Approved

In business since 2024

Free estimates

Small jobs welcome

"I finally got to build my dream garage to store all my tools and have a cool hangout on Friday nights with the boys n a couple coors. Chris came and did everything from the bathroom and the heating system. I will definitely be calling him back to add a mini split in the future. He was professional, punctual and clean. Very knowledgeable you can tell he cares about his clients."
Granite Ridge
Brook hill development
Sanborton
Derry
2.5 bathroom modular

+39

39 neighbors recently requested a quote
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Avatar for Mr. Rooter Plumbing & Heating
Mr. Rooter Plumbing & Heating
3.9(
358
)
Sewer Main - Install, Replace or Repair

Serving Merrimack, NH and surrounding areas

Approved

In business since 1995

Emergency services offered

Warranties offered

"I had a leak in my water main coming into the house in my crawl space. I called 2 local firms without being able to have so one come help. Linda from Mr.Rooter called me back within 10 minutes and scheduled a plumber for the next morning.Brian arrived by 11am accessed the situation gave me an estimate and was able to repair the leak. Very professional, courteous and timely. I still have not heard from my local company ! Very nice to have water again. I will use them again."
65 neighbors recently requested a quote
Recommended by87%of homeowners
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Avatar for Derry Plumbing & Heating
Derry Plumbing & Heating
3.7(
43
)
Sewer Main - Install, Replace or Repair

Serving Merrimack, NH and surrounding areas

Approved

In business since 1989

Free estimates

Emergency services offered

"My only complaint was when I made the call I was not told that there was a service fee - that is not right! The guys that installed the water heater were great and left no mess - they get 5 stars â­ ï¸"
Rinnai install
Designer shower
Drain line
Showroom shower/tub stall
Faucet fixtures

+2

Response time10 hrs
Response rate98%
9 neighbors recently requested a quote
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Avatar for Rescue Plumbing Services
Rescue Plumbing Services
4.4(
7
)
Sewer Main - Install, Replace or Repair

Serving Merrimack, NH and surrounding areas

Approved

In business since 2023

Customers say: True professional

"Rescue Plumbing is very knowledgeable and able for all our plumbing needs. When we want the best, we always call Rescue."
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+12

Recommended by83%of homeowners
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Avatar for Jeff's Drains
Jeff's Drains
4.5(
15
)
Sewer Main - Install, Replace or Repair

Serving Merrimack, NH and surrounding areas

In business since 2007

Emergency services offered

Credit card accepted

"Jeff was on time; came in at the exact price that he quoted, and was efficient. - The repair was completed in less than an 1 hour and was done well. Would highly recommend him!"
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Recommended by92%of homeowners
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Showing 1-10 of 26
FAQs for sewer main install, replace or repair projects in Merrimack, NH

Most trenchless sewer line replacements can be completed within one to three days, though this varies based on your situation. Simple repairs on accessible lines might be finished in hours, while complex systems or challenging soil conditions could extend the timeline. The reduced excavation requirements result in faster completion compared to traditional trenching methods.

Trenchless pipe lining may reduce the interior diameter of your pipes, which could affect flow capacity in already narrow lines. This method also requires the existing pipe to maintain sufficient structural integrity to support the new liner. Severely collapsed sections, major joint separations, or completely misaligned pipes might not be suitable candidates for lining and could require alternative approaches.

Trenchless sewer pipe liners are rated to last up to 50 years when properly installed and maintained. Actual longevity depends on installation quality, usage patterns, and environmental factors like soil movement or tree root intrusion. Regular maintenance and avoiding problematic disposal practices (like flushing non-biodegradable items) can help maximize your system's operational lifespan.

Trenchless technology availability varies by region, with greater accessibility in metropolitan and suburban areas where specialized contractors operate. Some rural locations may have limited access to trenchless equipment and expertise. Local regulations and soil conditions also influence availability. A professional assessment of your property and local contractor options will determine if trenchless methods are feasible for your specific location.

Professional video inspection provides the most reliable assessment of whether your sewer issues suit trenchless repair. Generally, pipes with moderate damage, like small cracks, minor leaks, or partial blockages, respond well to trenchless techniques. Completely collapsed sections, severe misalignments, or extensive structural failures might require traditional excavation. Consulting with contractors who offer both methods ensures you receive unbiased recommendations.

Quality trenchless sewer replacement often includes a workmanship guarantee from the contractor. The specific terms vary by company and region, but many professionals stand behind their installation for at least one year. Material warranties may extend longer, depending on the pipe products used. Always request written warranty information before hiring, and understand exactly what's covered and what might void your protection.

The Merrimack, NH homeowners’ guide to sewer main install, replace or repairs

From average costs to expert advice, get all the answers you need to get your job done.

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