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Verified Reviews for Water Softener Service pros in Foster City, CA

*The Angi rating for Water Softener Service companies in Foster City, CA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Water Softener Service needs.

*The HomeAdvisor rating for Water Softener Service companies in Foster City, CA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Water Softener Service needs.

Last update on November 03, 2025

Top-Rated Water softener pros in Foster City - Updated Nov 2026

Avatar for Facilities Plumbing & Drain
Facilities Plumbing & Drain
4.8(
52
)
Water Treatment & Purification System - Repair or Service

Serving Foster City, CA and surrounding areas

Approved

In business since 2014

Free estimates

Emergency services offered

"Robert came from an Oakland job to check our sump pump which was not working. We needed a new one as water was building under our house and rains were coming. He replaced it and all the water went out. He was very professional, wore a mask. Would hire him again."
Starbucks 100-Gal Waterheater
Sediments inside supply line
3M 100,000-Gal
dual 3m filter install
3M 100,000-Gal

+44

Response time6 hrs
Response rate100%
71 neighbors recently requested a quote
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Avatar for In & Out Plumbing & Construction Inc
In & Out Plumbing & Construction Inc
4.2(
79
)
Water Treatment & Purification System - Install or ReplaceWater Treatment & Purification System - Repair or Service

Serving Foster City, CA and surrounding areas

Approved

In business since 1998

Free estimates

Emergency services offered

"Found that the dispenser was damaged inside.  Could not fix.  Had to come back the next morning to fix leaking under the sink due to the work on the dispenser.  Re routed the water line so that we would still have water to the refrigerator but the join leaked so I had to turn it off at the valve.  The rerouting meant that I could not push back the sliding shelf that holds the supplies.  Had to remove it to be able to close the cabinet door.
"
San Francisco Sewer Line
Floor Drain
San Francisco Sewer Line
Floor Drain
San Francisco Sewer Line

+27

Response time1 day
Response rate99%
13 neighbors recently requested a quote
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Avatar for Dr. Drain Plumbing and Rooter
Dr. Drain Plumbing and Rooter
5.0(
16
)
Water Treatment & Purification System - Install or ReplaceWater Treatment & Purification System - Repair or Service

Serving Foster City, CA and surrounding areas

Approved

In business since 2022

Free estimates

Emergency services offered

"Was prompt and professional. Did the work quickly and well, and gave some advice on next steps. I’ll be hiring them again!"
Dr Drain
Checking gas leak
Drain pipes replacement
gas leak detector
Water heater replacement

+15

Response time9 hrs
Response rate89%
Recommended by100%of homeowners
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Avatar for Maverick Water Heaters & Plumbing
Maverick Water Heaters & Plumbing
5.0(
15
)
Water Treatment & Purification System - Install or Replace

Serving Foster City, 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
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Avatar for Hydro Works Well & Pump
Hydro Works Well & Pump
5.0(
7
)
Well Pump - Repair or Service

Serving Foster City, CA and surrounding areas

Approved

In business since 2004

Emergency services offered

Warranties offered

"Josh was informative, helpful, and clear on the work."
Completed Pump System
Flow Test
Pressure tank & controller
Panel Mounting
Pressure system

+3

Response time8 hrs
22 neighbors recently requested a quote
Recommended by100%of homeowners
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Avatar for Quality Pump Service
Quality Pump Service
4.5(
50
)
Well Pump - Repair or Service

Serving Foster City, 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
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Avatar for Cisneros & Sons Plumbing Inc
Cisneros & Sons Plumbing Inc
5.0(
8
)
Water Treatment & Purification System - Install or Replace

Serving Foster City, 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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Avatar for EJ Plumbing, LLC
EJ Plumbing, LLC
4.1(
8
)
Water Treatment & Purification System - Install or ReplaceWater Treatment & Purification System - Repair or ServiceWell Pump - Repair or Service

Serving Foster City, CA and surrounding areas

Approved

In business since 2007

Emergency services offered

Warranties offered

"I never give a full 5 stars, They were Very good and professional."
299 neighbors recently requested a quote
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Avatar for Clearwater Plumbing
Clearwater Plumbing
4.9(
225
)
Water Treatment & Purification System - Install or ReplaceWater Treatment & Purification System - Repair or ServiceWell Pump - Repair or Service

Serving Foster City, CA and surrounding areas

In business since 1998

Free estimates

Emergency services offered

"Very well. The housemate using it likes it. It works well and is a great improvement over the old, leaking and very noisy one. Will definitely have more work done in the house, as needed."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+18

Recommended by97%of homeowners
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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 Foster City, CA and surrounding areas

In business since 1991

Free estimates

Warranties offered

"He was on time, very professional and knowledgeable. Finished on time cleaned up nicely. Excellent price great tasting water"
Response time1 day
Recommended by100%of homeowners
Request Quote
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Water Softeners FAQs, answered by experts

You should not use a water conditioner with a water softener because a water conditioner changes the chemistry of the water and causes the ion exchange in a softener to be ineffective. Choose a water softener if you have hard water or well water, and use a water conditioner if you need to remove certain contaminants.

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.

The most effective way to fix hard water in your shower is by installing a whole-home water softening system. This system treats water as it enters your home, removing the minerals that cause hardness before they can reach your shower or any other fixtures. While this is the most comprehensive solution, other methods are often temporary fixes. For a more affordable and shower-specific option, you can install a water-softening showerhead or a shower filter. However, these filters are generally less effective and may not remove all the contaminants that lead to limescale and hard water stains. By implementing a water softening solution, you can expect a reduction in mineral deposits and enjoy the benefits of cleaner-feeling hair and skin.

Routine maintenance involves recharging the resin bed with salt or potassium, cleaning components, and periodic inspection.

Whether you need a permit or license for a water softener installation depends on your location, as requirements vary significantly. Some municipalities require the installer to hold a plumbing license, some mandate a permit and an inspection, and others require both. In some areas, no special permit or license is needed at all.

To determine the rules in your area, you can contact your local building department or consult a local water softener installer or plumber. Often, only certified professionals are authorized to pull the necessary permits, and they will typically handle the entire permitting process for you. Regardless of local laws, it is always recommended to hire a licensed professional to ensure the system is sized and installed correctly. You can use Angi’s state licensing tool to check an installer’s license status.

The Foster City, CA homeowners’ guide to water softener services

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

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