
Serving O Fallon, IL and surrounding areas
Approved
In business since 1995
Free estimates
Emergency services offered
"Very courteous, flexible in schedule. Quickly installed water softener."





+34

*The Angi rating for Water Softener Service companies in O Fallon, IL 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 O Fallon, IL 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 26, 2025

Serving O Fallon, IL and surrounding areas
Approved
In business since 1995
Free estimates
Emergency services offered
"Very courteous, flexible in schedule. Quickly installed water softener."





+34

Serving O Fallon, IL and surrounding areas
Approved
Super Service Award Winner
In business since 2014
Free estimates
Warranties offered
"Excellent job installing our water softener."



Serving O Fallon, IL and surrounding areas
Approved
Super Service Award Winner
In business since 2020
Free estimates
Offers commercial services
"Was surprised to get a response as quickly as I did. Even more surprised that he was able to complete the job the next day. Plumbers in this area are few and far between. We have a lot of iron in our water so this system has a third tank that addresses this issue instead of a small filter that we had to replace quite frequently."




Serving O Fallon, IL and surrounding areas
Approved (Corporate)
In business since 1993
Free estimates
Emergency services offered
"I don't like their complaints. The sewer water it's so full of tree roots. I always say that it was too foul. I was anticipating. I would use them again."





+5

Serving O Fallon, IL and surrounding areas
Approved
In business since 2023
Free estimates
Emergency services offered
Voted BEST Plumbing Company in Madison County by the readers of The Telegraph and Riverbend Association. 🏆\n\nCardinal Plumbing is a Premiere Plumbing outfitter for all residential and commercial service remodels, excavation, water service, interior plumbing and more! \nWe are famous for our 5-Star rating and A+ with the Better Business Bureau offering YOU Service With Excellence. ✅\n\n24 Hour Emergency Service Available❗️\n📲(618) 215-3780\n\n




Serving O Fallon, IL and surrounding areas
In business since 2007
Emergency services offered
Credit card accepted
"I took advantage of Angie's List free home inspection for mold and water. Paul was to arrive at noon and called and asked if he could arrive at 11:30 which was fine. My husband and I were both home for the inspection and boy did we learn a lot. We felt that Paul was very knowledgeable. He reassured us that we don't have a big mold problem. He also gave us a list of things that we could do to improve the humidity and keep our basement from forming a mold problem in the future. We've already completed all but one of Paul's recommendations. This company also does air duct cleaning which is why I initially joined Agie's List. There are tons of scams out there regarding air duct cleaning. I wanted to find a reputible company to provide this service. After working through the mold inspection with Paul, we feel that Absolute Clean will provide us with a good air duct cleaning. We plan to schedule that with them very soon.
"

Serving O Fallon, IL and surrounding areas
In business since 1974
Free estimates
Credit card accepted
"Initially, it went well. But I didn’t know what I didn’t know. The diagnosis of the problem was incomplete. Two large basement wall cracks (clearly visible at the time because wet dry wall had been removed) also contributed to the water issues and they were never discussed. In the fall of 2017, I came home from an overseas trip to find 2 inches of mud in my basement which had poured in over the drain tile installed by PermaJack. I reached out to the company a couple of times and was told I would be contacted the next week for an inspection. But this never happened. On the advice of my real estate agent, I turned to a different company for an inspection. The cracks were clearly diagnosed as a major issue. And when the drain tile/sump pump system installed by PermaJack was inspected, it was found that the drain tile was improperly installed. The pipe laying in the drain tile reservoir was twisted so that only a third of the holes in the pipe would even come into contact with water at any one time. In other words the system was easily overwhelmed and shouldn’t have been. In addition, the system should have been installed under the sill, the wooden board I left in place after ripping out the dry wall. Because it was installed in front of the sill, it never came into contact with the corner of the foundation and water could easily come into the basement over the drain tile. I realize at the time of the installation there was lots of water damage throughout St. Louis from the massive spring storm. But in retrospect, it seems like the job was rushed and for that reason it was not done properly. Also, when I reached out to the company to inspect their work, they were fairly unresponsive. They did say they would call me, but they never did."





+147

Serving O Fallon, IL and surrounding areas
In business since 2008
Emergency services offered
Credit card accepted
"He was able to quickly diagnose that the water leak from the water heater was a result of a ruptured tank, resulting in the need to replace the entire water heater."

Serving O Fallon, IL and surrounding areas
In business since 1971
Emergency services offered
Credit card accepted
"It went excellent. We have used Spenglers in the past for a complete Water Heater replacement, their office staff are spot on, their field techs are professional, personable and knowledgeable. They arrived on time, I was notified by the office when they were on the way, they made their scheduled arrival, and the entire job took less than 4 hours. The quality of materials is outstanding, the lines were all soldered in without any leaks, and the technician even took the time to show me how the new faucet could be tightened if leaks appear later on. This job is now two months complete and I have no leaks, and I can (finally) wash the cars and water the front flower beds without hauling hose or buckets. Awesome job for the Spengler's team!
"
Serving O Fallon, IL and surrounding areas
In business since 2009
Free estimates
Emergency services offered
"I HAD NOT EVEN GOTTEN OFF THE INTERNET BEFORE THEY CALLED ME TO SET UP AN APPOINTMENT. I RECEIVED AN APPOINTMENT THAT WAS GOOD FOR ME AND THEY WERE AT MY HOUSE AT THE TIME THEY SAID THEY WOULD BE. THEY HAD THE PART I NEEDED WITH THEM AND REPAIRED MY HOT WATER HEATER VERY QUICKLY AND FOR A REASONABLE AMOUNT. I WAS VERY HAPPY WITH THE EXPERIENCE."
From average costs to expert advice, get all the answers you need to get your job done.

How much a water softener costs in St Louis, MO, depends on your home’s size and the system’s type and capacity. Our expert guide explores all the price factors.

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There are four common softener alternatives available on the market today. We compare and contrast each one to help you find your best-fit solution in this blog.

Water softeners remove minerals from hard water in your home and make your water more pleasant to use. Learn more about how they work here.

Who repairs water softeners? You should be able to hire water softener repair and installation companies or plumbers to fix issues with these appliances.