Water Softener Installation in San Antonio, TX

Soft Water for Homes on Edwards Aquifer Supply

Softeners sized for your household and San Antonio hardness, installed by licensed plumbers, with a written price before the first pipe is cut.

San Antonio Water Softeners

Why Almost Every San Antonio Garage Has a Softener Loop

Walk into the garage of a house built in the last twenty years in Alamo Ranch, Stone Oak or Schertz and you will likely find two capped pipes sticking out of the wall near the water heater. That is a softener loop, and builders here install it as a matter of course because they know what the water is. San Antonio draws most of its supply from the Edwards Aquifer, a limestone formation, and the water arrives at your house carrying dissolved calcium and magnesium that come back out as scale on everything they touch.

A softener trades those minerals for sodium as the water passes through a resin bed, then rinses the resin with brine on a schedule. The result is water that does not leave crust on the shower glass, does not bury a water heater in sediment, and rinses soap off the way water in a soft-water city does. In the older neighborhoods inside Loop 410 and near downtown, there is no loop, so we cut one in where the main enters the house and run a drain for the regeneration cycle.

Sizing is the part that gets skipped. A softener is rated by how much hardness it can remove between regenerations, and that depends on your water test and how many people are in the house. The mechanics of resin, salt and regeneration are laid out on our water softeners page. Here is how it works out in San Antonio homes.

  • Sized from a test, not a guess Grain capacity matched to your hardness and household so it regenerates when it should, not constantly.
  • Loops cut in where none exist Older homes without a builder loop get one, with a bypass so outdoor spigots stay on hard water if you prefer.
  • Home Comfort Guarantee Licensed, bonded plumbers and a 100% satisfaction promise on the install.
Radiant plumber walking up to a newer San Antonio home for a water softener installation

Is It Time

Signs a San Antonio Home Needs a Softener

Most homes here need one. These are the signs it has become expensive to keep going without.

  • Shower glass that never comes clean

    The haze is mineral scale. Vinegar takes it off; a softener keeps it from coming back.

  • A water heater that rumbles

    Scale on the tank bottom. Softened water slows the buildup to a crawl and adds years to the heater.

  • White film on dishes and the dishwasher door

    Minerals drying on the surface. Rinse aid hides it; soft water removes the cause.

  • Skin that feels tight after every shower

    Soap reacting with hardness and leaving a residue. One of the first things people notice after a softener goes in.

  • Faucets and showerheads clogging with crust

    Aerators and spray heads scaled shut. A recurring small repair that a softener retires.

  • A loop in the garage with nothing on it

    The builder made it easy. Connecting a softener to an existing loop is a short install.

Softener Services

Water Softener Services Across the San Antonio Area

New installs, replacements, repairs and the drinking-water systems that pair with them.

Smiling Radiant water softener technician in front of a Radiant service van in San Antonio
Water softener installation, repair and service across the San Antonio area.

Install Day

How a Softener Goes In

Test, size, install, set. Then salt every month or two and forget about it.

  1. Hardness test and walkthrough

    We test at your tap, count bathrooms and people, and find the loop or the spot where one will go.

  2. Written quote

    Unit, loop work if needed, drain and bypass, itemized and honored for 72 hours. Financing through Service Finance Company if you want it.

  3. Installation

    Plumbed, drained, powered and programmed for your hardness and household. Outdoor spigots left hard if you ask.

  4. Retest and hand-off

    We test the softened water, show you the bypass and the salt, and answer the question everyone asks about the taste.

Ready for Soft Water?

One test, one written quote, one afternoon in the garage.

What Our Customers Say

Don't just take our word for it — hear from our satisfied customers

J Jeff Fazio
Jeff Fazio 3 years ago
★★★★★
I had Radiant Plumbing replace my tankless water heater, damaged in the Feb. 2021 snowmageddon storm with a new unit. The process was smooth and professional from start to finish. The plumber, James, was extremely knowledgeable and thoroughly explained my options to me. The cost and time to perform the installation were just as estimated. When he was done, James explained how to maintain the system, what service would be needed and how to perform it, and answered all of my engineering geek questions. It was a thoroughly positive experience. I have used several different plumbers in Austin over the past 15 yrs, but my search is over - I will not hesitate to call Radiant next time and would recommend them unreservedly.

8/9/23 Update: I have subsequently used Radiant for a toilet repair, faucet installation (Danny), and drain work (Ezekiel) and they have continued to impress with knowledgeable, friendly plumbers and quality work.
C Cathy McClaugherty
Cathy McClaugherty 5 years ago
★★★★★
We called Radiant Plumbing after we noticed a water leak in our kitchen. We were in a time crunch and they were able to schedule us quickly, before we left for vacation. They sent their representative, Preston Nichols, and he was excellent to deal with! He was on time, skillful, friendly, and very professional. It turned out to be a problem with our dishwasher but Preston was quick to diagnose it and set our minds at ease. While he was here, we mentioned that our one year-old water heater needed to be flushed. Preston was quick to take care of that, as well, saving us time and money in the process. Radiant charged us almost half the price another plumber quoted us for that service! While Radiant Plumbing isn’t our usual plumber, they gained a new customer. We won’t hesitate to call Radiant again in the future based on our VERY positive experience with them.
S Stefano Rosellini
Stefano Rosellini 6 years ago
★★★★★
Had 3 different systems installed by them approx. 3 years ago for a total of approx $20k. I was quite happy with the install until the year later when they came for a maintenance call and started finding deficiencies in their own install. they wanted extra money to address those deficiencies. Now I am in the process of selling my home and an inspector has found a few items that need to be addressed and they will not even look at the report unless I schedule a $139.00 service call. Very poor customer service.. This company does not stand by their work and would not recommend.

I am revising my review of this business from 1 to 5 stars. After my original review I was contacted by the company's service manager and he made sure that I was taken care off. I had a team of 3 technicians coming to my house to double check the system and make the necessary adjustments. I was very satisfied by their attention to details and professionalism.

Maintenance Membership

Join the Care Club

Home maintenance for $9.99 a month.

Care Club members get two HVAC tune-ups and a plumbing safety inspection every year, priority scheduling, no dispatch fees — ever — and 5% off every repair.

  • Priority scheduling
  • Seasonal HVAC tune-ups
  • Annual safety inspection
  • Exclusive member discounts
  • Free dispatch on repairs
  • No long-term contracts

San Antonio Water Softener Questions

What size water softener does a San Antonio family need?

It comes down to two numbers: how hard your water is and how much of it your household uses. Softeners are rated in grains of capacity, meaning how much hardness they can remove before they need to regenerate. Multiply your hardness by daily water use and you know how fast a given unit will exhaust. San Antonio water is hard enough that a family of four in a three-bath house usually needs more capacity than the smallest units on the shelf, but oversizing wastes money and lets the resin sit too long between cycles. We test your water at the tap, ask about the household, and size from there. A unit that regenerates every few days on a sensible schedule is the goal.

My new house in Alamo Ranch has a “softener loop” in the garage. What is that?

It is the builder doing you a favor. A softener loop is a section of the main water line, usually two capped pipe stubs on the garage wall near the water heater, that routes all the water for the house through one spot so a softener can be connected without cutting into the plumbing. There is normally a hose bib or drain nearby for the regeneration cycle and an outlet for the control valve. Homes built across the far west side, Stone Oak and the I-35 suburbs in the last couple of decades almost all have one. Connecting a softener to an existing loop is a short, clean install, and it is the cheapest a softener will ever be to add to that house.

Will a softener make my water taste salty?

Not salty, but different. A softener exchanges hardness minerals for a small amount of sodium, in proportion to how hard the water was to begin with. In San Antonio the water is hard, so the sodium added is more than it would be in a soft-water city, but it is still far below what most people would describe as salty; the change people notice is more that the water feels slick and lacks the mineral taste they were used to. If anyone in the house is on a sodium-restricted diet, or you simply prefer the taste, a reverse osmosis tap at the kitchen sink removes the sodium along with everything else for drinking and cooking. Many of our softener installs include one.

Can I keep the outdoor spigots and sprinklers on hard water?

Yes, and we usually recommend it. There is no benefit to softening water that goes onto the lawn, and softened water on plants and soil is not ideal over time. Skipping the irrigation also means the softener regenerates less often and uses less salt. In a house with a builder loop, the outdoor lines often already branch off before the loop. In an older home where we cut the loop in, we can leave the hose bibs and the irrigation feed upstream of the softener. Tell us which outdoor taps you want hard and which you want soft, such as a spigot for washing a car, and we will plumb it that way.

How often does a softener need salt and service in San Antonio?

Salt depends on your hardness and water use, but for a typical San Antonio household expect to add a bag or two every month or so; keep the brine tank about half full and never let it run empty. Service is lighter than most people think. Once a year, check that the brine tank has not formed a salt bridge, a hard crust that leaves the water below it untouched, and clean the brine well. Resin beds last many years on city water, less on wells with iron. If you notice scale returning, the unit running through brine too fast, or the control head cycling at odd hours, call us. Care Club members get the softener looked at during the annual plumbing inspection.

*Offers cannot be combined with other promotions or applied to dispatch fees. No cash value. Must present offer at time of service. Call for details.
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