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

Avatar for Flatirons Plumbing, Inc.
Flatirons Plumbing, Inc.
4.7(
265
)
Water Treatment & Purification System - Repair or Service

Serving Denver, CO and surrounding areas

Approved

Super Service Award Winner

In business since 2015

Free estimates

Emergency services offered

"I called with an emergency water leak and I was unable to identify the location of the leak. Diana was wonderful setting up the service visit. Larry showed up within an hour. I donâ t have enough good things to say. Larry was quick and precise but took his time to educate me about the repair. Larry offered advice regarding future projects we are considering and based off the service provided, I wonâ t be asking any other companies for a quote. If I could give 6 stars, I would. Thank you so much for helping to turn a rough morning into a good day."
Our Flatirons Plumbing Team!
We promise to listen to our customers
The Flatirons Plumbing Team
Response time5 hrs
6 neighbors recently requested a quote
Recommended by83%of homeowners
Avatar for Franklee Plumbing LLC
Franklee Plumbing LLC
5.0(
13
)
Water Treatment & Purification System - Repair or Service

Serving Denver, CO and surrounding areas

Approved

Free estimates

Offers commercial services

"If you’re looking for someone you can actually trust, Isaiah is the person to call. From the moment he arrived, it was obvious he genuinely cared about helping me make the right decision, not just making a sale. He took the time to educate me on my options for a whole home water filtration system and a tankless water heater, explaining the pros and cons of each without ever making me feel pressured. What impressed me most was how kind, honest, and knowledgeable he was throughout the entire process. He was the only contractor who took the time to truly educate me instead of just giving me a quote. I walked away feeling informed, cared for, and confident that I was making the best decision for my home. It’s rare to find someone who combines technical expertise with such genuine care for their customers. Isaiah is truly one of a kind, and I wouldn’t hesitate to recommend him to anyone looking for honest, client first service."
3 neighbors recently requested a quote
Avatar for Heart Heating, Cooling, Plumbing & Electric
Heart Heating, Cooling, Plumbing & Electric
4.7(
92
)
Water Treatment & Purification System - Repair or Service

Serving Denver, CO and surrounding areas

Approved

Super Service Award Winner

In business since 2019

Free estimates

Emergency services offered

"So pleased with Heart Heating, Cooling, Plumbing & Electric! My lower level bathroom toilet and tub had backed up sewage coming into it and they were able to get a technician out in less than 2 hours. Jason inspected my entire system and the clog had cleared and did not repeat so no repairs were needed. He answered all my questions and gave me advice on ways to prevent the situation in the future and was very friendly. The cost was a small service call fee - well worth my peace of mind!"
Additional Photos
Additional Photos
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Additional Photos

+24

10 neighbors recently requested a quote
Recommended by81%of homeowners
Avatar for Jim Needham Heating Cooling Plumbing & Drain
Jim Needham Heating Cooling Plumbing & Drain
4.5(
72
)
Water Treatment & Purification System - Repair or Service

Serving Denver, CO and surrounding areas

Approved

In business since 2018

Free estimates

Emergency services offered

"first jim needem was so professional, caring about my water situation. he immediately called me back and set up a service for a sunday. Ben came and i can not say enough about his patience,professionalism, caring and was so helpful with my situation. He took the time to educate us and help us understand the system. He checked all points of our water in our house. he also had some suggestions for the future which we will do. this company also has a person to extract water thru my insurance for my carpet. He left nothing out. His expertise and honesty was amazing. I hope everyone who reads this will use this company. If there were 20 stars they would definitely get them. I am so thankful for their customer service, and kindness. Thank you Jim and Ben colleen L in Broomfield colorado"
After
Furnace
Outdoor a/c (condensing) unit
Indoor furnace
Outdoor a/c (condensing) unit

+1

Response time2 days
18 neighbors recently requested a quote
Recommended by89%of homeowners
Avatar for B.C. Plumbing Services
B.C. Plumbing Services
5.0(
10
)
Water Treatment & Purification System - Repair or Service

Serving Denver, CO and surrounding areas

Approved

Super Service Award Winner

In business since 2024

Free estimates

Emergency services offered

"I would highly recommend Brady (BC Plumbing) to anyone. I was thoroughly impressed with his prompt and excellent service on the install of my water main. His prices are more than reasonable. I admired his patience and ability to work with me as I accepted his offer in June, but did not get back to him until late September. At which point there was no delay in getting things done! Thanks Brady and your marvelous crew!"
Tankless Water Heater
Tankless Water Heater
Tankless Water Heater
Tankless Water Heater
Tankless Water Heater

+95

Response time6 hrs
Response rate86%
10 neighbors recently requested a quote
Avatar for Headstrong Plumbing
Headstrong Plumbing
5.0(
9
)
Water Treatment & Purification System - Repair or Service

Serving Denver, CO and surrounding areas

Approved

In business since 2021

Free estimates

Emergency services offered

"Such an approachable and understandable and affordable service. My furnace was out and my landlord was in no hurry to send someone. After the exact diagnosis and parts replaced and documented my landlord approved to pay for these services and all other going forward. It's so nice to have someone close to be able to help us with house and car repairs needed at a competitive affordable price. He will be a family contact always."
Sewer Replacement
Response time10 mins
Response rate100%
Recommended by33%of homeowners
Avatar for Tipping Hat Plumbing, Heating & Electric
Tipping Hat Plumbing, Heating & Electric
4.0(
812
)
Water Treatment & Purification System - Repair or Service

Serving Denver, CO and surrounding areas

Approved (Corporate)

In business since 2000

Free estimates

Emergency services offered

"Very professional, fast and quality work. We needed a water heater and they came out the same day. We had a 40 gallon storage tank water heater and had it replaced with a 50 gallon. They replaced three or valves all of the water heater lines and gas line. New drip pan and drain set up with a leak alarm."
tipping hat
tipping hat
tipping hat
tipping hat
Response time9 hrs
616 neighbors recently requested a quote
Recommended by86%of homeowners
Avatar for Poseidon Plumbing Solutions
Poseidon Plumbing Solutions
4.3(
15
)
Water Treatment & Purification System - Repair or Service

Serving Denver, CO and surrounding areas

Approved

In business since 2023

Free estimates

Credit card accepted

Welcome to Poseidon Plumbing, proudly servicing Denver and the surrounding areas. Our goal is to complete your project to perfection. Our focus is building long lasting relationships with the customers that we serve. We look forward to serving you. Call us today! You will not be disappointed.

Response time6 hrs
Recommended by81%of homeowners
Avatar for 303 Drain Now, LLC
303 Drain Now, LLC
5.0(
6
)
Water Treatment & Purification System - Repair or Service

Serving Denver, CO and surrounding areas

Approved

In business since 1993

Free estimates

Emergency services offered

"Harold was super nice, informative and genuinely concerned about my problem and went thru all the steps to troubleshoot it, everything down to testing the water pressure. He was here till 8:30pm to get the job done. Thanks!"
kitchen sink repair
Response time30 mins
Response rate100%
Recommended by100%of homeowners
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FAQs for water treatment & purification system repair or service projects in Denver, CO

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 Denver, CO 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.