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Top-Rated Water treatment & purification system installers and replacers in Fairfax - Updated Nov 2026

Avatar for Purfect Water Solutions, Inc.
Purfect Water Solutions, Inc.
4.8(
486
)
Water Treatment & Purification System - Install or Replace

Serving Fairfax, VA and surrounding areas

Approved

Super Service Award Winner

In business since 2017

Free estimates

Warranties offered

"Installed both a water softener and reverse osmosis system at my home. They did a great job with the installation, was professional, and ensured everything was working perfectly. Highly recommend their services for water purification needs!â"
1
Reverse Osmosis
Our work
Install 2
Our work

+1

Response time10 hrs
Response rate100%
1108 neighbors recently requested a quote
Avatar for WaterBoy, LLC
WaterBoy, LLC
4.8(
23
)
Water Treatment & Purification System - Install or Replace

Serving Fairfax, VA and surrounding areas

Approved

In business since 1990

Free estimates

Emergency services offered

"Top shelf team. Not the cheapest but you get what you pay for. Excellent sales, installation, and support experience. Highly recommended. The water purification system they sold me is very high quality."
REVERSE OSMOSIS DRINKING WATER "SPICKET"
REVERSE OSMOSIS DRINKING WATER SYSTEM
WELL WATER INSTALL (MULTIPULE UNITS)
WEST VIRGINIA INSTALL
Response time2 days
43 neighbors recently requested a quote
Recommended by94%of homeowners
Avatar for DB's Plumbing & Drain
DB's Plumbing & Drain
4.8(
194
)
Water Treatment & Purification System - Install or Replace

Serving Fairfax, VA and surrounding areas

Approved

In business since 2008

Free estimates

Emergency services offered

"Excellent communication via text and email so you know exactly when your service technician will arrive. Tommy and Duncan were very polite and professional. They looked over the main water shutoff valve that I wanted to replace and then explained what they were going to do and how much it would cost. Completed the work promptly and cleaned up the work site before leaving. I would highly recommend DB's Plumbing and Drain!!"
Sewer replacement Inside and out
Team at our new locations ribbon cutting
Expansion tank with new venting
New pipe continued
Whole house re pipe

+212

Response time12 hrs
Response rate100%
2 neighbors recently requested a quote
Avatar for Appleton Campbell
Appleton Campbell
4.6(
339
)
Water Treatment & Purification System - Install or Replace

Serving Fairfax, VA and surrounding areas

Approved

In business since 1976

Free estimates

Emergency services offered

"Appleton Campbell just did a complicated 2-day gas furnace/AC unit installation attached our home. It was, probably, the most professional and well-handled vendor experience I have ever had, particularly with some complications that occurred due to things found after the old system was removed. From the sales process to the pre-project staff to the office staff who alerted me each time the crew was heading to my home, to the on-site crew of Mike W., Danny R. and Jake A., the experience was A+. Even when the one issue was presented, they came up with a solution and I remained confident they would. They were extremely clean and neat, during and after they were done. I did getting three bids for this and they were slightly higher than the others, but I felt more comfortable and frankly, I believe I got my moneys worth as they also had to fabricate and redo a complicated return and vent line, and they also moved the gas line, refrigerant line and other conduits/poles/switches to a more convenient area than with my prior (similar but older) system. In short, I felt like the value was there. They also included a Home Savings Agreement for one year and left me with a consolidated notebook of all relevant documents. Cheapest is not always better, and with all they did, the pricing was very, very close. I've known AC for years in the community, but only used them on a couple of occasions. I've become a huge fan and will use them again (I have other systems!)."
Additional Photos
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Additional Photos

+1

Response time11 hrs
Response rate100%
5 neighbors recently requested a quote
Avatar for Snell Heating & Air Conditioning, LLC
Snell Heating & Air Conditioning, LLC
4.6(
255
)
Water Treatment & Purification System - Install or Replace

Serving Fairfax, VA and surrounding areas

Approved

In business since 1972

Free estimates

Emergency services offered

"My tech was quick to point out some rather glaring issues that were difficult to rationalize. I immediately recalled a prior summertime repair from a different company whereby my system was deemed to be at the end of its useful life. Two wires (yes two) were found unconnected at the safety pressure switch. A toggle switch on the Trane Gas valve was found in the off position also. This system will go another ten years, I'm convinced of that, but it appears this Vienna, VA outfit felt that they could make the case with dubious business practices."
Snell Plumber Kitchen
Snell Tech Water Heater
1 neighbors recently requested a quote
Recommended by90%of homeowners
Avatar for SwiftPro Heating, Cooling & Plumbing
SwiftPro Heating, Cooling & Plumbing
4.6(
166
)
Water Treatment & Purification System - Install or Replace

Serving Fairfax, VA and surrounding areas

Approved

Super Service Award Winner

In business since 2024

Free estimates

Emergency services offered

"SwiftPro was excellent. When our hot water heater went out (at nearly 20 years old, we were neither upset nor surprised!) we reached out to a few places but SwiftPro was the most responsive and had the price was fair. Zabi, the service technician was fantastic. I can’t say enough good things about him. He was prompt, provided excellent communication, took meticulous care with the work and work space, and was just a great person to talk to. The install went great and there was no aggressive sales tactics or upselling. Just a genuine cut and dry hot water heater removal and install experience. I highly recommend SwiftPro. Thanks Zabi!"
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

81 neighbors recently requested a quote
Recommended by43%of homeowners
Avatar for First Choice Plumbing & Remodeling
First Choice Plumbing & Remodeling
4.8(
128
)
Water Treatment & Purification System - Install or Replace

Serving Fairfax, VA and surrounding areas

Approved

Super Service Award Winner

In business since 2010

Free estimates

Emergency services offered

"I definitely recommend Tommy and his crew. Our well pump stopped working and we didnâ t have any water. Tommy came out and determined what was wrong for free, gave me an accurate estimate. They were able to replace everything that day and get us water back. They were good natured and hard working, finishing the job in the dark. Came back the next day and cleaned out all our faucets, clearing the sediment stirred up from the new pump. All things considered, it was a very positive experience."
Response time5 hrs
Response rate92%
10 neighbors recently requested a quote
Avatar for Appleton Campbell, Inc.
Appleton Campbell, Inc.
4.3(
61
)
Water Treatment & Purification System - Install or Replace

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%
194 neighbors recently requested a quote
Avatar for Dexter Wells & Plumbing, LLC
Dexter Wells & Plumbing, LLC
4.3(
15
)
Water Treatment & Purification System - Install or Replace

Serving Fairfax, VA and surrounding areas

Approved

In business since 1983

Free estimates

Emergency services offered

"Called Dexter Wells & Plumbing and John was about to come out the same day and the very next day installed a new well pump and pressure tank for us. We are very pleased with the services received. John is a very nice man and definitely knows what he is talking about when it came to our issue. Would without a doubt recommend them and use them again."
Close up of screen
Pump and screen assembly
Pump in well screen
Additional Photos
Additional Photos

+6

2 neighbors recently requested a quote
Recommended by85%of homeowners
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