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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
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
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
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

"Wow! After a few "no-show" plumbers, I found a gem amidst the storm - literally! My sewer ejection pump stopped working and Ramiro was my hero! We were able to coordinate over the phone with me describing my situation and sending a few pictures. Ruben showed up this morning and was probably one of the nicest, kindest, more competent people I have had work on my house ever. He was able to restore my pump to working order and replace the parts needed. Ruben was very communicative and precise in his diagnosis and repair. He left after a few hours with my pump back up and running - the pump was cleaned out and the alarm float replaced. I am so relieved and more importantly, happy to know whom to call if one of my 4 pumps is in need of some TLC at any time. You would be lucky if you needed help with your pumps to have Quality Pump Service be able to help you!"
Response time5 hrs
12 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 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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Water Softeners FAQs, answered by experts

It depends on the type of surface. For instance, if you’re trying to get rid of hard water deposits on glass, you can spray vinegar onto the surface and wipe it off with a soft cloth or non-abrasive sponge. However, if the deposits are on granite or natural stone, it’s better to use baking soda and water rather than vinegar or other acidic cleaners.

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.

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

Experts recommend that you put two to four bags of potassium chloride in your water softener every month. This amount depends on how much is in the bag (40 pounds is most common) and what your water softener manufacturer recommends. For more specific advice, talk to a water softener pro in your area and read the manual that came with your system.

Soft water is better for your hair. The minerals in hard water can dry out hair, make it brittle, and leave a film on the hair and scalp that may cause irritation. Hard water also doesn't rinse out shampoo and conditioner effectively, which can lead to product buildup that makes hair look dull and limp. You may also find you need to use more shampoo to get a good lather in hard water.

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.