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  • Average homeowner rating star icon4.9
    Average homeowner rating
  • Verified reviews icon25
    Verified water softener services reviews

Top-Rated Water softener pros in Sunnyvale - 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 Sunnyvale, CA and surrounding areas

Approved

In business since 2021

Free estimates

Emergency services offered

"The Tankless Guys not only installed a new water softener system, they also put in a new tankless water heater and a new toilet. They provided excellent service. We had a range of options to choose from and Sergio and his team performed all the work in a timely manner. Sergio also answered any questions we had thoroughly. I highly recommend them!"
Give us a call today at 408-580-0031
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+5

Response time7 hrs
Response rate91%
Recommended by100%of homeowners
Avatar for Maverick Water Heaters & Plumbing
Maverick Water Heaters & Plumbing
5.0(
15
)
Water Treatment & Purification System - Install or Replace

Serving Sunnyvale, CA and surrounding areas

Approved

Free estimates

Emergency services offered

Warranties offered

"Highly recommended. Steve spent time with me on the phone educating me about the pros and cons of tankless and heat pump water heaters. He followed up quickly with a competitive estimate after visiting my home. He is knowledgeable about rebates that can save a lot of the cost. He is a bayren approved contractor which is required if you want to take advantage of their rebates. He installed one water heater this week and everything went very smoothly. Next week I am having him back to put in a heat pump water heater."
Tankless Water Heaters
Tankless Water Heaters
Tankless Water Heaters
Tankless Water Heaters
Tankless Water Heaters

+33

Response time11 hrs
4 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for GOLDS PLUMBING INC
GOLDS PLUMBING INC
5.0(
6
)
Water Treatment & Purification System - Install or Replace

Serving Sunnyvale, 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 Sunnyvale, 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 Quality Pump Service
Quality Pump Service
4.5(
50
)
Well Pump - Repair or Service

Serving Sunnyvale, CA and surrounding areas

Approved

In business since 2010

Emergency services offered

Small jobs welcome

"This business operates with integrity and honesty which is difficult to find these days. I'd highly recommend them for any commercial or residential plumbing and water-well project or issues."
Response time5 hrs
11 neighbors recently requested a quote
Recommended by87%of homeowners
Avatar for Cisneros & Sons Plumbing Inc
Cisneros & Sons Plumbing Inc
5.0(
8
)
Water Treatment & Purification System - Install or Replace

Serving Sunnyvale, 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
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Water Softeners FAQs, answered by experts

Hard water doesn’t hurt, but it might feel more abrasive, especially if you have sensitive skin. It’s also about how your skin feels after bathing. You might feel as though you have a sticky film over your body because you do—it’s all that soapy residue left behind because the hard water can’t rinse it off completely.

No. You should never directly drain a water softener into a sewer cleanout. This practice is illegal in many areas because it could allow raw sewage to get into your drinking water and make you seriously ill. Many places have codes requiring a specific seal, pipe, and a large air gap between a water softener and a sewage cleanout. Check out Florida's Plumbing Building Code as an example of what these restrictions might look like.

If your water softener repair is fairly straightforward, like a simple filter replacement, then you can probably do it yourself with little risk. However, anything beyond a simple fix should be addressed by someone with extensive plumbing expertise to avoid costly water softener problems, like leaks. 

That said, even simple problems can be complicated to diagnose, particularly if your water softener is attached to a whole-house treatment system. So, unless you feel absolutely certain that the problem is an easy fix that you can take on yourself, it's probably best to hire a plumber to diagnose and fix the problem.

There are several things that can shorten the life of a water softener. Homes with very hard water may have to replace the unit sooner because the water softener works harder to filter out the hard minerals. High water usage and infrequent maintenance can also put more strain on a water softener.

Yes, a water softener can remove scale deposits. According to the U.S. Department of Energy, after you add a water softener to your home, “gradually the softer water will dissolve limescale scale deposits and remove the problem entirely.” Installing a water softener—or water descaler—will also help prevent new scale deposits from forming.

The Sunnyvale, CA homeowners’ guide to water softener services

From average costs to expert advice, get all the answers you need to get your job done.