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Top-Rated Water treatment pros in Gardena - Updated Nov 2026

Avatar for Hague Quality Water
Hague Quality Water
4.6(
92
)
Water Treatment & Purification System - Install or ReplaceWater Treatment & Purification System - Repair or Service

Serving Gardena, CA and surrounding areas

Approved

In business since 1994

Free estimates

Warranties offered

"Thank you Paul and David for such a seamless process of getting our water softener + filter installed! Paul worked with us, was always available, and ensured we got the exact system we needed. David was such a pro and installed it for us exactly how we needed it. You can tell how much they care and believe in their products. Our water also feels AMAZING."
H3500 Reverse Osmosis
R.O. Installation
WaterMax Signature Series
WaterMax Signature Series Cutaway
Response time1 day
Recommended by95%of homeowners
Avatar for Pro Water Solutions, Inc.
Pro Water Solutions, Inc.
4.9(
58
)
Water Treatment & Purification System - Install or Replace

Serving Gardena, CA and surrounding areas

Approved

In business since 2001

Free estimates

Credit card accepted

"Just had a water system installed, including RO, carbon and water softener. Only been running a few days so still have to see performance over long-haul. Brad has been very helpful so far and Jack and his team did a good job with the install. They've been responsive to questions, and also came back to install a water pressure regulator for a reasonable cost. So far, so good with ProWater."
Water Softener Carbon System Outdoors
Water Softener Carbon In Garage
Under sink reverse osmosis with upgraded insta hot
Water Filtration
Softener/Uv light

+14

Response time1 day
133 neighbors recently requested a quote
Recommended by98%of homeowners
Avatar for Pure Water Filtration
Pure Water Filtration
5.0(
5
)
Water Treatment & Purification System - Install or Replace

Serving Gardena, CA and surrounding areas

Approved

In business since 2022

Free estimates

Emergency services offered

With 50 years of combined experience, we at Pure Water Filtration pride ourselves on being the best in the industry. Our ability to design and install complex projects separates us from our competitors. We do everything from simple installs such as residential reverse osmosis to more complex commercial multi-unit apartment buildings or well water treatment. For pure, healthy water, we have a solution for any budget. We use American-made products, allowing us to offer the best warranties in the industry. All of our products meet NSF and ANSI standards. Pure Water Filtration has a close relationship with the California State Drinking Water Program and local testing laboratories. We guarantee you will be satisfied when choosing Pure Water Filtration as your go-to water treatment specialist.

Plumbing Project
Water softener replacement
Commercial Water Softener and Carbon system
Unidyne Water Softener and Carbon Combo system
Water Softener and Backwashing Carbon system

+3

23 neighbors recently requested a quote
Avatar for Dutton Plumbing, Cooling, Heating & Electric
Dutton Plumbing, Cooling, Heating & Electric
5.0(
5
)
Water Treatment & Purification System - Repair or Service

Serving Gardena, CA and surrounding areas

Approved

In business since 1987

Free estimates

Emergency services offered

Dutton Plumbing, Cooling, Heating & Electrical runs out of two locations, one in Simi Valley and one in Sylmar. We’ve been working out of this valley since 1987. From those two shops, we cover Ventura County, the San Fernando Valley, Santa Clarita, and Northern Los Angeles County. That’s plumbing, drain and sewer, water heaters, HVAC, and electrical, all handled by the same crews. Nearly four decades in the same region adds up. Our crews have been inside enough houses out here to recognize what a given neighborhood tends to do before they open anything up. Post-war ranch homes behave one way, newer builds behave differently, and we’ve seen it all.

20 neighbors recently requested a quote
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