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Top-Rated Water treatment & purification system repair or service pros in Fairfax - Updated Nov 2026

Avatar for Quality Water LLC
Quality Water LLC
4.8(
90
)
Water Treatment & Purification System - Repair or Service

Serving Fairfax, VA and surrounding areas

Approved

In business since 1998

Free estimates

Credit card accepted

"Randy Williams was both very professional, very knowledgeable and just a genuinely nice guy. The install of the water filtration system was my first for my first home and he put my nerves at ease. If you have a question about what he is doing or about what equipment is being installed he will answer it. He went over everything he installed with me and made sure I understood what I needed to do on my part to maintain the filtration system. I highly recommend his company for any install or service you may need for your water."
Logo
Response time6 hrs
11 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for HydraLux Systems LLC
HydraLux Systems LLC
5.0(
6
)
Water Treatment & Purification System - Repair or Service

Serving Fairfax, VA and surrounding areas

Approved

In business since 2025

Free estimates

Warranties offered

HydraLux is a small, family-owned business with 15 years of experience, carrying on his father’s 30 year legacy and expertise providing premium water treatment across the DMV. We’re proud to offer FREE water testing, competitive pricing, service on existing systems, and personalized solutions tailored to your home or business. With a commitment to unmatched customer care and clean water for every family, we treat your home like our own. Let us help today!

Response time2 hrs
Response rate100%
35 neighbors recently requested a quote
Avatar for Dexter Wells & Plumbing, LLC
Dexter Wells & Plumbing, LLC
4.3(
15
)
Water Treatment & Purification System - Repair or Service

Serving Fairfax, VA and surrounding areas

Approved

In business since 1983

Free estimates

Emergency services offered

"Excellent service! They were able to come out the day I called to evaluate our well that evening. They were able to a**** the problem and detect exactly what the root cause instead of masking it with a water filtration system as another professional had recommended. Dexter's plumbing went above & beyond helping us and we greatly appreciate it. We highly recommend them."
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Pump and screen assembly
Pump in well screen
Additional Photos
Additional Photos

+6

2 neighbors recently requested a quote
Recommended by85%of homeowners
Avatar for SwiftPro Heating, Cooling & Plumbing
SwiftPro Heating, Cooling & Plumbing
4.6(
166
)
Water Treatment & Purification System - Repair or Service

Serving Fairfax, VA and surrounding areas

Approved

Super Service Award Winner

In business since 2024

Free estimates

Emergency services offered

"Outstanding and exceptional are two words that describe my experience of having SwiftPro complete my residence’s new HVAC system installation. From presentation of various systems and particulars to the completed install Rich Kelly, Moises Rojas and Felix proved themselves experts with above and beyond customer service, skill, attitude and work ethic. I highly recommend SwiftPro for any plumbing, heating or cooling needed."
Air Conditioner Trane Unit Install
Duct Cleaning
Tri County Feeds Customized ducts and HVAC complete systems
Trane HVAC Heating & A/C Install
Trane Install Heating & AC Project. Dual-Fuel & Solar-Compatible Systems

+62

95 neighbors recently requested a quote
Recommended by43%of homeowners
Avatar for Appleton Campbell, Inc.
Appleton Campbell, Inc.
4.3(
61
)
Water Treatment & Purification System - Repair or Service

Serving Fairfax, VA and surrounding areas

Approved

In business since 1976

Free estimates

Emergency services offered

"Pressure tank for my well ruptured. Appleton Campbell literally responded in a minute or 2, and within 2 hours someone came out to give me a quote and said that this could be fixed by 2 pm. I hired them and sure enough everything was done very quickly and I had water again! Price was a little higher than I expected but it was definitely worth it due to the professionalism of the crew they sent to do the work. I would definitely hire Appleton Campbell again!"
Happy HVAC Technician
Electrician gathering parts
Checking in the equipment needed for the day
Happy Electricians
We make our own sheet metal!

+9

Response time9 hrs
Response rate94%
212 neighbors recently requested a quote
Ashton Plumbing
4.3(
228
)
Water Treatment & Purification System - Repair or Service

Serving Fairfax, VA and surrounding areas

Approved

In business since 2008

Free estimates

Emergency services offered

"Curtis Ashton's on-time and prompt service, his professionalism, and his pleasant demeanor while replacing my home's main water shutoff and pressure reducing valve was excellent! I already discussed additional plumbing work with him. I recommend him without any reservations!"
  Plumbing
  Plumbing
  Plumbing
  Plumbing
  Plumbing

+11

Response time6 hrs
Recommended by93%of homeowners
Avatar for John C Flood LP.
John C Flood LP.
4.4(
62
)
Water Treatment & Purification System - Repair or Service

Serving Fairfax, VA and surrounding areas

Approved

Super Service Award Winner

In business since 1920

Free estimates

Warranties offered

"James Matthews was the John C. Flood plumber that responded to my call for water leakage from the kitchen faucet. He quickly located the source of the water leak and repaired it quickly. The cold water supply line valve had locked up and couldn't be turned off, so James quickly replaced the old dial valve with a 1/4 turn valve (which had already been done for the supply lines for the dishwater and hot water). In and out in quick order and cleaned up all debris. Very personable, too."
Tech Education
John C. Flood - Going to Work
John C. Flood - Teamwork
John C. Flood - Busy Morning
John C. Flood - Work Underway

+28

Response time2 hrs
42 neighbors recently requested a quote
Recommended by49%of homeowners
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FAQs for water treatment & purification system repair or service projects in Fairfax, VA

If your water softener is over 10 years old or if repair costs approach the price of a new unit, it might be time to replace it. Most water softeners last between 10 and 15 years. Replacing an aging unit can improve your water quality and help you avoid frequent repair costs. For a newer system with minor issues, repairing may be the best option. Consider the age and condition of your system to decide what's most cost-effective.

Water treatment systems remain dependable for 10 to 20 years with proper maintenance and care. A well-maintained system secures full performance by following a scheduled upkeep plan and professional inspections. Consistent maintenance guarantees continuous water purification, ensuring that the system operates at its peak efficiency and delivers high‑quality water throughout its lifespan.

Faulty water softeners exhibit clear symptoms that signal the need for immediate attention. Noticeable mineral build-up around faucets, discolored water, dry or itchy skin following a shower, and altered laundry texture indicate that the system is underperforming. Recognizing these issues early and addressing them promptly prevents further damage and maintains optimal water quality. Early intervention ensures that your water system continues to operate reliably and efficiently.

The Fairfax, VA homeowners’ guide to water treatment & purification system repair or services

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