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

Blue Line Water Inc.
4.9(
51
)
Water Treatment & Purification System - Install or Replace

Serving Bellevue, WA and surrounding areas

Approved

In business since 2001

Free estimates

Emergency services offered

"Chris responded rapidly to our request for service. I really appreciated the knowledge he shared as we are first time well owners. I feel we are in a much better position to handle decisions around repairs and necessary updates going forward. I would highly recommend Blue Line Water and plan to work with them in the future for system maintenance."
Response time1 day
29 neighbors recently requested a quote
Recommended by95%of homeowners
Avatar for Harts Plumbers, Electricians, & HVAC Technicians
Harts Plumbers, Electricians, & HVAC Technicians
4.6(
1,043
)
Water Treatment & Purification System - Install or Replace

Serving Bellevue, WA and surrounding areas

Approved

In business since 2013

Emergency services offered

Warranties offered

"Service came to my house within 30 minutes of me contacting them to them to replace my broken water tank with an O.A. Smith brand. The person took the time to educate me about what had to be done to replace the hot water tank and why it needed to be put in a certain way. Person also took the time to teach me how to maintain the hot water tank. Their man office stayed in touch with me during the installation and followed up afterwards to be sure I was satisfied with every aspect of the installation process."
Before the Extension
After Extension
Recommended by92%of homeowners
Avatar for SIMBA SOLUTIONS CO LLC
SIMBA SOLUTIONS CO LLC
4.7(
18
)
Water Treatment & Purification System - Install or Replace

Serving Bellevue, WA and surrounding areas

Approved

In business since 2025

Free estimates

Warranties offered

"Here are the reasons why I gave Simba Solutions 5***** and would highly recommend them and use their services in the future. 1. An honest down to earth small family business that will go out of their way to ensure that your plumbing issues are resolved professionally. 2, Jason the owner is on site! He is prompt, easy to work with and takes the time to explain what is going on during the process. 3. Goes beyond to ensure that his work is complete to his satisfaction. Through the process of elimination he was able to determine that there was a blockage between the washing machine and main line. So every time the washing machine would drain, the water would backup into the tub. Thank you Jason and Tammy!!! For, your info and precaution. If you have an attachment that goes at the end of your drain hose of your washing machine. To prevent loose items from the washing machine to plug the drain that the end piece itself, doesn’t separate and plug the drain!! Pic of culprit attch."
Simba plumbing
Simba plumbing
Simba plumbing
Simba plumbing
Simba plumbing

+29

1 neighbors recently requested a quote
Avatar for Machias Power and Plumbing
Machias Power and Plumbing
5.0(
11
)
Water Treatment & Purification System - Install or Replace

Serving Bellevue, WA and surrounding areas

Approved

In business since 2024

Free estimates

Emergency services offered

"Aaron and his team did an excellent job from start to finish, and I’m completely satisfied with their work. They installed my Tesla car charger efficiently, and I would gladly recommend them and use them again for any future electrical needs."
Tesla Charger
Outdoor service
Inverter
solar mounting
76 neighbors recently requested a quote
Avatar for Dear Services
Dear Services
3.5(
285
)
Water Treatment & Purification System - Install or Replace

Serving Bellevue, WA and surrounding areas

Approved

In business since 2014

Emergency services offered

Warranties offered

"I did not put in a tankless system. Instead I replaced the expansion tank and kept my gas water heater. The work was fast and efficient. Their price was excellent compared to other companies."
Kitchen rewire
lighting upgrade
Condo Rewire
Condo Rewire
Condo Rewire

+13

Response time12 hrs
16 neighbors recently requested a quote
Recommended by75%of homeowners
Avatar for Pure Water Northwest
Pure Water Northwest
5.0(
9
)
Water Treatment & Purification System - Install or Replace

Serving Bellevue, WA and surrounding areas

In business since 2015

Free estimates

Credit card accepted

"Pure Water Northwest (PWN) is the best, easiest way to future-proof your house's water supply. They offer installation of the best products made to clean water for everything from the kitchen sink to the shower, and everything between. Chris owns the company and he employs capable technicians who do most of the surveys & installations for PWN. A couple of them did the initial survey of my house and gave me a simple estimate within an hour, along with a line item for each hole and pipe that needed to be plumbed. When it came time for installation, PWN was pretty busy and Chris jumped in to take over some installations - including mine! I was lucky enough to have a first-rate water purification expert do my installation, and it was excellent. At one point Chris found a valve error a previous plumber made and he resolved the problem and improved the valve in the process. From turning off the water main valve to turning it on again, it was ~90 minutes (super fast). Chris was in and out of my crawl space with new lines run in no time. The purification device was installed smartly in a corner of the garage so it didn't get in the way of parking or anything else. PWN set me up with a slick Texas-made Reionator Pro Ultra by Water Tech, and it has changed my water consumption literally overnight. The PNW-installed Reionator purifies water from the primary line, and even though Kitsap County has high quality water, I love the assurance that for now into the future, no matter what happens to the water utility or the environment, water will be clean for every sink, bathtub, and even toilet. Chris finished off the install with a custom video he did on the spot while I recorded him explaining the system to me - he knows everything rote about the products he installs and the video is much easier to refer to for operation & maintenance than referring to a thousand-page reference manual. And finally, the finance team at PWN was kind enough to let me pay in a few monthly installments for my system, which makes it easier (and less expensive) to finance on a credit card. If you want to invest in the best possible water quality for your house (forever), then I recommend you call Chris & co. at Pure Water Northwest."
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+30

Recommended by100%of homeowners
Avatar for Home Comfort Alliance
Home Comfort Alliance
4.7(
341
)
Water Treatment & Purification System - Install or Replace

Serving Bellevue, WA and surrounding areas

In business since 1977

Free estimates

Emergency services offered

"It went extremely well! All of the GS Technicians were timely, efficient, and professional. They were friendly and easy, and answered/explained all questions and concerns we had during the installation. They were considerate of our home and went above and beyond to accommodate our wishes. We highly recommend GS heating!"
Additional Photos
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+1

Response time1 day
Response rate100%
Recommended by91%of homeowners
Showing 1-10 of 44

The Bellevue, WA homeowners’ guide to water treatment & purification system installations and replacements

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