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Find Sewer main install, replace or repairers in Amherst

Granite State Sewer & Drain Cleaning Co
4.9(
13
)

Serving Amherst, NH and surrounding areas

Approved

In business since 1981

Emergency services offered

Warranties offered

"They did an excellent job. It required 5 trips because we had multiple problems. We had a sewer back up and they came right away. They were extremely professional, reliable courteous, and answered all my questions. I would highly recommend them and I would definitely hire them again."
Additional Photos
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1 neighbors recently requested a quote
Recommended by91%of homeowners
Avatar for Expedition Plumbing
Expedition Plumbing
5.0(
9
)

Serving Amherst, NH and surrounding areas

Approved

Free estimates

Emergency services offered

Warranties offered

"David responded promptly and answered all the questions professionally, prior even him coming out to our home . Day when he came to replace new water heater he explained options and advised on also possible issues arising from previous old plumbing that we had which he also happily replaced . Strongly advise him , extremely happy with work that was performed."
Expedition Plumbing
33 neighbors recently requested a quote
Avatar for Mr. Rooter Plumbing & Heating
Mr. Rooter Plumbing & Heating
3.9(
354
)

Serving Amherst, NH and surrounding areas

Approved

In business since 1995

Emergency services offered

Warranties offered

"Thank you to Keith who promptly called the first night I made the inquiry to Sandi who arranged everything to Eugene and Ryan who came out to repair leaking pipes on the water filtration system and replace the kitchen faucet on a Saturday to accommodate my schedule! They were very kind and professional. Eugene and Ryan did an amazing job. They had to cut out and replace brass fittings and pex piping, replace the shut-off valve and replace the kitchen faucet. They know what they re doing and make a great team! I am very pleased with the results! I consider it a blessing to have met them and done business with the wonderful people who are part of Mr. Rooter!"
33 neighbors recently requested a quote
Recommended by88%of homeowners
Avatar for Sila Heating, Cooling, Plumbing and Electrical
Sila Heating, Cooling, Plumbing and Electrical
4.5(
5,397
)

Serving Amherst, NH and surrounding areas

Approved (Corporate)

In business since 1989

Free estimates

Emergency services offered

"We needed our boiler replaced and had multiple companies come and look at the job. We ended up selecting Sila as we read good reviews on the company. Sila surpassed our expectations. The tech who performed the install (Gage) was on time, communicated the entire process to us from start to finish and did a tremendous job. He also made sure to clean up afterwards and was very professional. We would absolutely hire Sila again!"
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+6

Response time2 days
63 neighbors recently requested a quote
Recommended by89%of homeowners
Avatar for Derry Plumbing & Heating
Derry Plumbing & Heating
3.7(
43
)

Serving Amherst, NH and surrounding areas

Approved

In business since 1989

Free estimates

Emergency services offered

"Once again Derry Plumbing has met all my expectations for quality work and complete professional service. Mike and Christian just removed a tub unit and replaced with a walk-in shower unit. They were courteous, answered all my questions and kept everything spotlessly clean every day, I've used them for years and will continue to do so and will recommend them to friends!"
Rinnai install
Designer shower
Drain line
Showroom shower/tub stall
Faucet fixtures

+2

Response time9 hrs
Response rate86%
6 neighbors recently requested a quote
Avatar for Just Drains
Just Drains
5.0(
3
)

Serving Amherst, NH and surrounding areas

In business since 1985

Free estimates

Emergency services offered

"Larry from Just Drains was absolutely great to work with. He was professional, knowledgeable and incredibly decent. I joined Angie's List, in part, to sing his praises. 
My main sewer line recently backed up due to tree root intrusion. It was awful. I jumped online and started calling area plumbers, and one company was particularly responsive. However, the plumber who arrived could only provide a very temporary fix because he didn't have the necessary equipment. In the end, (and to his credit) that plumber returned two more times in an effort to remedy the problem, but each time had equipment issues and wasn't able to do much. 
I then found Just Drains and told them my story. I talked to Larry on a Sunday and he was at my house Monday morning. He had the tools and a lot of know-how. Larry scoped the line, cut out a good amount of roots, and used RootX to (hopefully) keep the roots at bay for up to a year. 
Most impressively, he took pity on me because I already spent so much money trying to fix the problem (I even rented an electric snake from Home Depot during my frustrations with Plumber No. 1) and didn't charge me the approximate cost of his services. It was one of the most decent acts I've seen from a service company.
I'm working to figure out a more permanent fix to my main line (it's 85-year-old), but it's comforting to know I have a good person/company available to help me manage the problem."
Recommended by100%of homeowners
Avatar for Viper Drain Cleaning LLC
Viper Drain Cleaning LLC
4.2(
10
)

Serving Amherst, NH and surrounding areas

In business since 2022

Free estimates

Credit card accepted

"A friend of mine referred me to Viper Drain Cleaning. I couldn’t get the tub to drain properly so after trying a few remedies I called them to help me out. The guy who showed up was friendly and professional. He wore plastic wraps over his boots and thoroughly cleaned the tub afterwords. After checking the whole system he showed me what looked like a leaking pipe in the basement. He kept me updated, showed me photos of the work and made sure I approved before proceeding. I would certainly recommend this company to others having plumbing or draining problems."
Blocked Main Sewer Line
Kitchen Sink Londonderry NH
De-Rooting Service & Video Inspection of Line
Partial Line Replacement & Tub Line Hair Removal
Multi-Family MSL, Video Inspection, Pipe Repair

+73

Recommended by80%of homeowners
Showing 1-10 of 19
FAQs for sewer main install, replace or repair projects in Amherst, NH

Sewer line replacement costs range from $50 to $250 per linear foot. Your replacement costs rise or fall based on material quality, installation complexity, and the specialized equipment crews need for excavation. Deeper lines cost more to access, and choosing budget-friendly PVC piping rather than premium copper also shifts the final price.

A sewer sleeve repairs cracked or damaged sections of a sewer pipe without the need for excavation. In this process, technicians insert a cured-in-place pipe (CIPP) liner, saturated with epoxy, to seal defects and restore the pipe’s integrity. This approach protects your yard, trims repair time, and adds years to your sewer system’s life—all while delivering reliable results.

Newer homes use durable PVC and ABS piping that offer smooth interiors and effective clog prevention at an affordable cost. Older homes use materials such as copper, Orangeburg, clay, cast iron, or lead, which require a licensed plumber’s inspection to confirm safety and performance. This clear distinction impacts maintenance and overall system reliability.

Red flags include persistent clogs, recurring sewage backups, and unexplained spikes in utility bills. Strong sulfur odors, bubbling drains, and visible sewage in the yard serve as unmistakable warning signs. These symptoms demand immediate professional inspection and repair to prevent further property damage and health hazards, ensuring the system operates safely.

All sewer line projects require permits because strict sanitary and biohazard regulations mandate regulatory approval. Homeowners must secure permits, incurring a specific permit fee of $200 in addition to contractor costs. A licensed professional or local building department manages the permitting process, ensuring the work complies with all legal requirements before the project begins.

A clogged sewer line is not covered by standard homeowner’s insurance policies because these policies exclude damage from regular wear, tear, and neglect. In cases of accidental damage—such as when tree roots block the line—certain policies provide coverage. Homeowners must review their policy details or consult with their insurance provider to confirm the coverage terms.

The Amherst, 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.