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Find Sewer main install, replace or repairers in Portsmouth

Avatar for Mr. Rooter Plumbing & Heating
Mr. Rooter Plumbing & Heating
3.9(
354
)

Serving Portsmouth, 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!"
18 neighbors recently requested a quote
Recommended by88%of homeowners
Avatar for Derry Plumbing & Heating
Derry Plumbing & Heating
3.7(
43
)

Serving Portsmouth, 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%
5 neighbors recently requested a quote
Avatar for Heritage Home Service
Heritage Home Service
4.0(
465
)

Serving Portsmouth, NH and surrounding areas

In business since 1986

Free estimates

Emergency services offered

"This project was completed in a timely manner and was scheduled when I needed due to other work going on at my house. The plumbing was installed professionally and looks great."
Oil tank installation
Water filtration
Celing fan installed.
Outdoor condenser unit.
Garbage disposal installed under kitchen sink.

+14

Response time9 hrs
Recommended by75%of homeowners
Avatar for Coy Plumbing & Heating
Coy Plumbing & Heating
5.0(
8
)

Serving Portsmouth, NH and surrounding areas

In business since 2024

Free estimates

Emergency services offered

"Mitchell was very professional and great at the work he’s done on my 2 homes. I’ve had 2 bathroom remodels. Funace and hot water heater replaced. Put an expansion water tank on one of my homes. Hooked up my water for my new refrigerator and dishwasher. Have not had any issues with his work. Highly recommend."
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+4

Response time2 days
Response rate100%
Recommended by87%of homeowners
Avatar for Brother Sons Excavation
Brother Sons Excavation
5.0(
6
)

Serving Portsmouth, NH and surrounding areas

In business since 2016

Brother sons Excavation has been in service for 10 years our family team specializes in multiple high quality services.\nPatios\nBlock walls \nWalkways \nGranite curbing \nYard enhancements \nHydro seeding\nDemolition\nHouse lots \n Excavation \n

Patios Project
Pool filled in wall built with hydro seeding
Driveways - Asphalt Project
Driveways - Asphalt Project
Patios Project

+69

Recommended by100%of homeowners
Avatar for American Home Shield – Home Warranty
American Home Shield – Home Warranty
3.5(
5,688
)

Serving Portsmouth, NH and surrounding areas

In business since 1971

Credit card accepted

"Well, the first time the replacement was ordered it was the wrong one, which of course, delayed the installation a week. When it was finally installed I had to pay an additional $850 for code upgrades. This I was not informed of by Home Shield. Then we noticed that there was water on the garage floor and found that the pipe coming in from the wall was leaking at the wall so had to call the plumbing company back out to fix it. They first tried to say it was not their fault but since there wasn't a leak before they installed they did fix it. I have used Home Shield a few times before and never had a problem. Some of the companies they use are not the best so you have to research them before you commit. I have found HS service to be good if you do your homework. At the end of the day I was without hot water for almost 3 weeks but it was do to the plumbing company they sent out."
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+2

Recommended by65%of homeowners
Kenco, LLC
5.0(
2
)

Serving Portsmouth, NH and surrounding areas

In business since 2018

Free estimates

Warranties offered

"THE BEST!! Leon,Leon Sr,and Aden did a meticulous job installing sump pump and outdoor drainage.So glad to have found this company,heaven sent!I got ghosted by several other plumbing companies and then I found KENCO,thank goodness!!Friendly,professional,masters at their craft,excellent communication,superb work and left work area neat and clean!Superior work ethic,a diamond in the rough!If you need plumbing service,look no further-THIS IS THE COMPANY YOU WANT!!The top of the line and great price to boot!Thank you Paige for your constant contact!"
Before
After
Well tank
Hybrid water heater
Hybrid water heater

+2

Response time40 mins
Recommended by50%of homeowners
DONOVAN PLUMBING AND HEATING LLC
New to Angi

Serving Portsmouth, NH and surrounding areas

In business since 2025

Free estimates

Offers commercial services

We're dedicated to providing our clients with the very best in service, installation, and repair for all phases of your plumbing needs. We specialize in a variety of residential and commercial services and take pride in the attention to detail put into each of the projects we're involved with. We're known for our quality work and the integrity of our business. We look forward to building long-term relationships with our clients and guarantee your satisfaction.

FAQs for sewer main install, replace or repair projects in Portsmouth, NH

When installing a sewer line, you should consider extra costs like tree removal, driveway repairs, or patio resurfacing. Hiring a professional plumber is essential, and you may need additional specialists if landscaping or heavy excavation is involved. Addressing these potential extras up front helps ensure accurate budgeting and prevents sudden cost overruns.

To calculate the length of sewer piping you need, measure the distance from your house to the main sewer line, adding the depth of the city main to this distance. Be sure to account for any obstacles like tree roots or utility lines that may require additional piping.

City sewer lines are installed at a lower elevation to prevent unwanted backflow and water damage. This lower positioning ensures enhanced performance and long-term safety, meeting all technical and safety standards.

With trenchless methods, a plumber inserts a smaller pipe within the existing plumbing, avoiding full excavation. It can be more cost-effective and less disruptive than traditional methods, but it's not suitable for all homes.

Yes, you must secure permission from your local water authority before connecting to a public sewer line. This approval ensures your connection meets all regulatory requirements.

Sewer lines are buried between 18 inches and 8 feet deep, with most systems placed between 18 and 30 inches. In colder regions, pipes are set deeper to remain below the frost line.

The Portsmouth, 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.