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Top-Rated Water treatment pros in San Jose - Updated Nov 2026

Avatar for The Tankless Guys Plumbing Corp.
The Tankless Guys Plumbing Corp.
5.0(
13
)
Water Treatment & Purification System - Install or ReplaceWater Treatment & Purification System - Repair or Service

Serving San Jose, CA and surrounding areas

Approved

In business since 2021

Free estimates

Emergency services offered

"I met Gert when we hired him to replace our Tankless water heater. I was so impressed with is knowledge and concern to make sure the installation was neat and clean. The piping is literally a work of art. We met with Gert and Sergio to discuss the next phase. They removed all the galvanized pipe and installed 3/4" copper with a true hot water recirculating line for Tankless recirculating pump. Before they started work, they came in and placed protective covers over the hardwood floors. Sergio and his team replaced all the cast iron drains with ABS. They even opened walls where needed to get to the old galvanized drains to the sinks. They pulled up toilets and replaced the old flanges with new ones. All that's left is the sewer line from the house to the street. We will be calling Gert and Sergio when reach that point. Gert, Sergio and the whole crew have something you do not see that often anymore. That's integrity and concern for their customer. Also very conscientious of keeping our home clean."
Give us a call today at 408-580-0031
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give us a call
give us a call
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+5

Response time7 hrs
Response rate91%
Recommended by100%of homeowners
Avatar for A JACQUES PLUMBING & DRAIN
A JACQUES PLUMBING & DRAIN
5.0(
32
)
Water Treatment & Purification System - Install or Replace

Serving San Jose, CA and surrounding areas

Approved

In business since 2024

Free estimates

Emergency services offered

"AJ came out same day to help with me when I noticed the pipes on my water heater were corroded. He was very professional, polite and knowledgeable. He was able to fix my problem right away and what he charged me was very reasonable. I would use him again for future plumbing needs."
Whole house Water Filter
Whole house Water Filter
Response time7 hrs
Response rate100%
Avatar for Cisneros & Sons Plumbing Inc
Cisneros & Sons Plumbing Inc
5.0(
8
)
Water Treatment & Purification System - Install or Replace

Serving San Jose, CA and surrounding areas

Approved

In business since 2024

Free estimates

Credit card accepted

"I had my water heater installed by Octavio, and everything was absolutely perfect! He was professional, on time, and made sure the job was done right. The whole process was smooth and stress-free, and the quality was great. I’m extremely happy with the results and would definitely recommend him to anyone who needs plumbing work done."
Response time4 hrs
Response rate100%
5 neighbors recently requested a quote
Avatar for GOLDS PLUMBING INC
GOLDS PLUMBING INC
5.0(
6
)
Water Treatment & Purification System - Install or Replace

Serving San Jose, CA and surrounding areas

Approved

In business since 2023

Free estimates

Warranties offered

"Needed to have filtered water going to my refrigerator. He did a great job?installed a filter under the sink, then ran a line through the back of the bottom cupboards around the kitchen to the refrigerator. ??????????"
Response time2 hrs
Response rate96%
Recommended by83%of homeowners
Avatar for Super Brothers Plumbing Heating & Air
Super Brothers Plumbing Heating & Air
4.9(
9
)
Water Treatment & Purification System - Install or ReplaceWater Treatment & Purification System - Repair or Service

Serving San Jose, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2013

Free estimates

Emergency services offered

"Never had such a great experience with any contractor. So grateful to Eugene, Artem, Nick, and Alex not only for the great work they did, but for the care and attention they put in for 3 straight months. My house is built kind of complicatedly and the water heater isn't located in the most accessible place, but they were able to make it work. Not only that, but Eugene found me a new tankless water heater that would also work with my radiant floors - not only saving cost, but space as well. To say they went above and beyond is an understatement. They came back multiple times to make sure work was up to par - never half-assing anything. Really hoping I don't have any reason to need to reach out again soon, but if I do, I know who I'll be calling. Also, special shout out to Jeremy, Karen, and Kathy for their logistical help as well!"
Heat Pump Water heater installation
Rheem Heat Pump Water heater
AO SMITH HEAT PUMP WATER HEATER
sewer line ready to be installed
Sewer Line Project

+27

Response time3 hrs
Response rate100%
24 neighbors recently requested a quote
Avatar for Puronics Service, Inc.
Puronics Service, Inc.
4.0(
38
)
Water Treatment & Purification System - Install or ReplaceWater Treatment & Purification System - Repair or Service

Serving San Jose, CA and surrounding areas

In business since 1991

Free estimates

Warranties offered

"Before installation, I had a lot of questions and swinging among the products. The staff has been very patient. Installation crew, Anthoney, was on time. He is very professional and knowlegable. The install location he suggested save us thousand dolloars. He also cleaned up after himself. Treated water feels great. Puronics is a high quality product with excellent price. Highly recommanded."
Response time1 day
Recommended by100%of homeowners
Avatar for Fluid Dynamics Plumbing Inc
Fluid Dynamics Plumbing Inc
5.0(
37
)
Water Treatment & Purification System - Install or Replace

Serving San Jose, CA and surrounding areas

In business since 2025

Free estimates

Emergency services offered

"Had to replace old water heater that leaked and flooded my basement- the Fluid team was amazing and timely - were able to come quickly and stop the leak and basement drain and ultimately replaced my water heater- very professional staff - communicated well and very fair pricing - would call them again for any plumbing issues at my house!"
Water Heater Repair
Wall Water Heater
Trench Install
Trench Install
Trench Install

+13

Response time10 hrs
Response rate100%
3 neighbors recently requested a quote
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