Top-rated water treatment & purification system installers and replacers.

Get matched with top water treatment & purification system installers and replacers in Portsmouth, NH

Enter your zip and get matched with up to 3 pros

Matching on HomeAdvisor

Share some details icon
Share some details about your home project.
Match with local pros icon
Within moments, match with highly-rated local pros.
Compare quotes icon
Compare quotes and choose the best pro for the job.

Find Water treatment & purification system installers and replacers in Portsmouth

Avatar for Maine's Best Water Treatment
Maine's Best Water Treatment
4.9(
229
)

Serving Portsmouth, NH and surrounding areas

Approved

Super Service Award Winner

In business since 2016

Free estimates

Warranties offered

"Brad was quick to respond, arrived an time and did an amazing job. We now have an easy to use & maintain water treatment system to remove arsenic."
Iron Gate
4" X 10" Big Blue sediment filter
Point of use reverse osmosis system
Acid neutralizer
Repco AquaBubble Water Softener

+2

Response time9 hrs
253 neighbors recently requested a quote
Recommended by94%of homeowners
Avatar for SECONDWIND WATER SYSTEMS, INC
SECONDWIND WATER SYSTEMS, INC
4.9(
36
)

Serving Portsmouth, NH and surrounding areas

Approved

In business since 1989

Free estimates

Emergency services offered

"Secondwind Water Systems was excellent from start to finish. The process began about three months ago with Jesse, a Certified Water Specialist, who thoroughly tested our water and designed a comprehensive system. He was patient, informative, and never pushy while I took time to decide. Installation was completed this past Monday and included sediment filtration, a water softener, radon and PFAS removal, and reverse osmosis to our drinking water and refrigerator ice maker. Patrick, the senior technician, and his assistant Ronald were professional, knowledgeable, and did a very clean, well-organized basement install. Patrick took the time to explain how the system works and what maintenance is required. Christine in the office was friendly and extremely helpful with payment and organizing all documentation needed for state reimbursement related to the PFAS system. Highly recommend Secondwind Water Systems for quality work and excellent customer service."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+2

Response time1 day
18 neighbors recently requested a quote
Recommended by97%of homeowners
Avatar for H2O Care Inc
H2O Care Inc
4.8(
43
)

Serving Portsmouth, NH and surrounding areas

Approved

In business since 1987

Free estimates

Emergency services offered

"The team is amazing. Formerly known as Atlas, H2O Care is professional and technical. I had many, many questions since I'm installing an new heating and hot water system. The newer technology is higher efficiency, so need to pay more attention to water quality. The tech team is fabulous, especially David who put up with my many, many questions. Highly recommended, especially in areas with very hard water."
Whole House Reverse Osmosis Desalination System
High efficiency water softener with sediment and carbon filtration to correct hard water, manganese and sediment build-up as well as chlorine taste & odor on this public water supply.
The water from this private well revealed high radon and iron in the lab water test.  This system eliminated these water quality issues.
Additional Photos
Additional Photos

+22

Response time5 days
36 neighbors recently requested a quote
Recommended by93%of homeowners
Avatar for H2O in the 603 Water Treatment, LLC
H2O in the 603 Water Treatment, LLC
5.0(
5
)

Serving Portsmouth, NH and surrounding areas

Approved

In business since 2022

Free estimates

Emergency services offered

"Brian responded promptly, was professional and courteous. He came right away to do an assessment and returned within a few days to install a new water softener system. He presented me with a lower cost option that could have been done same day but I chose to replace a 17 year old system with a new system that is more accurate (better monitors water use) and less costly to operate because it uses less salt. He performed several preventative maintenance updates: re-piped and plumbed in a new particulate cartridge, cleaned the screen on the radon system and replaced the solenoids, all within the cost of what other companies quoted for only the water softener replacement. The last technician that serviced our water systems (Radon & RO) rushed through the job and left them in worse shape than they were before he "serviced" them. Brian recognized the issues and fixed them. I will now be using H20inthe603 for all of my water treatment service. Thank you Brian for a job well done!"
Local Installation
New Construction
Water Softener
Response time4 hrs
27 neighbors recently requested a quote
Recommended by60%of homeowners
Avatar for Heritage Home Service
Heritage Home Service
4.5(
986
)

Serving Portsmouth, NH and surrounding areas

Approved (Corporate)

In business since 1988

Emergency services offered

Warranties offered

"I asked for a rep to come to give quotes for repair or replacement of my gas boiler. Before he came the old boiler failed, and Heritage was able to quickly install a new one so that we without heat and hot water for only a short time."
Golf Tournament
Water quality team
HVAC tech
Electrical team
Bryan, electrician

+24

187 neighbors recently requested a quote
Recommended by91%of homeowners
Avatar for Derry Plumbing & Heating
Derry Plumbing & Heating
4.5(
30
)

Serving Portsmouth, NH and surrounding areas

Approved

In business since 1989

Free estimates

Emergency services offered

"Been with another company for many years last time I call them for price to replace expansion tanks they gave price 859.00 thatà ¢à  à  s last time heard lot about Derry plumbing called Dave and they sent out a technician his name was Tyler very professional look over my unit told me had other issues with my system showing all possible that system was old he would only be taking my money to install the expansion tank and the unit is old and if fails this winter parts will be very hard to get note the unit been in house for 30 years have served my good so Tyler gave est that fair price to replace Dave gave me some options and was very professional so I set up appointment to have replaced thanks to Derry plumbing à ¢à ­à  à ¯à ¸à  à ¢à ­à  à ¯à ¸à  à ¢à ­à  à ¯à ¸à  à ¢à ­à  à ¯à ¸à  à ¢à ­à  à ¯à ¸à  à ¢à ­à  à ¯à ¸à  à ¢à ­à  à ¯à ¸à  à ¢à ­à  à ¯à ¸à  à ¢à ­à  à ¯à ¸à  à ¢à ­à  à ¯à ¸à  Thank you Paul Hickey Derry New Hampshire"
Rinnai install
Designer shower
Drain line
Showroom shower/tub stall
Faucet fixtures

+2

Response time9 hrs
Response rate86%
Recommended by46%of homeowners
Avatar for Maffei Plumbing and HVAC, LLC
Maffei Plumbing and HVAC, LLC
4.7(
7
)

Serving Portsmouth, NH and surrounding areas

Approved

In business since 2010

Free estimates

Emergency services offered

At Maffei Plumbing and HVAC, LLC, we are committed to your comfort. With an experienced and qualified staff to provide quick service for any service needed. We can solve any problem with a friendly face. Give us a call for a free estimate.

Air Conditioning Installation
Rinnai Tankless
Water Filtration
Heating Systems
Heating Systems

+6

Response time1 day
65 neighbors recently requested a quote
Recommended by14%of homeowners

The Portsmouth, NH homeowners’ guide to water treatment & purification system installations and replacements

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