Get matched with top tankless water heater installers in O Fallon, MO

"It started off bad because I had the water heater installed, submitted my paperwork for my rebate for the installation and then my rebate ended up not getting honored because the water heater that was installed didn't qualify for Spire's rebate. Turn's out that the water heater that would fit my location as well as satisfy Spire's rebate, I would have had to wait 5 to 6 weeks for that specific water heater so, the owner of Hosack's Plumbing cut me a check for the amount of the rebate and the amount over time that the new water heater would have saved me. Not the perfect situation but, that was a win win for me as well as Hosack's Plumbing because a good water heater was installed just not one that would quite fit the Spire requirements for the rebate! Hence we didn't need to take a brand new water heater out and replace it with another water heater that was just .05 UEF Higher!"

"This was a complex retrofit tankless water heater installation and out of 30+ companies called and solicited for this project, Brett and Dunn's HVAC was the only company to 1) entertain performing the installation correctly (gas line sizing and calculations), 2) had prior experiencing working with tankless heaters, and 3) took the time to work with me on a long list of specifications. These are bulletproof systems if the installation is done correctly and Dunn/Brett took the time to ensure the install was on point and everything went smoothly. They also installed a softener and filtration system. Everything went well from bid to install and I highly recommend Brett and Dunn's - will use again as I could not be more pleased!"

"Remove electric water heater and install a new high efficiency gas water heater."

"Cody was professional and the install was done in a timely manner"

"I CALLED FOR AN ESTIMATE AND HE INSTALLED A NEW WATER HEATER THE NEXT DAY. 500.00 DOLLARS LESS THAN THE OTHER ESTIMATE."

At Mr. Rooter® Plumbing every customer’s individual needs are important. Whether it’s a simple sink clog or a damaged sewer line, you can count on a Mr. Rooter plumber to take care of your plumbing needs – day or night – with never an overtime charge. Our professional service, quality products and honest, up-front pricing make Mr. Rooter the best value in plumbing services nationwide. Mr. Rooter is ready for all emergency plumbing issues, from clogged drains and sewage backups to frozen pipes and leaking water heaters. You can count on an expert diagnosis from Mr. Rooter with our camera inspection tools. Then we’ll fix it right the first time, whether it takes HydroScrub® drain cleaning or trenchless pipe repair, with courteous smiles on our faces. There's a reason they call us Mr.® Call your local Mr. Rooter today.

"Jacob did a fabulous job replacing my water heater! He was professional and timely!"

"We hired Master Remodel & Construction after our master bathroom, kitchen and garage suffered major water damage after an interior flood caused by an overflowing toilet. Brian Inkley (owner) and Jacob Quick (project manager) have a team of dedicated, talented professionals. They did a superb job in restoring our damaged house. They are a busy team of workers who kept us appraised of their availability for the various stages of our restoration. For the repairs that they didn't do themselves they had excellent recommendations for the professionals we needed such as the carpet installation, closet system installation, kitchen cabinets and the refinishing of our hardwood floors. They seem to be in demand, working at several projects at the same time but we always felt that we were their top priority. Jacob worked with our homeowners insurance adjuster to be sure that the funds allocated for our losses were enough to complete our projects. We recommend Master Remodel & Construction with pleasure."

Winnovations Plumbing is a local, family-owned plumbing company proudly rooted in St. Louis. For more than a decade, we’ve been the neighborhood plumbers you can trust, built on a family legacy of quality craftsmanship and dedicated service.\n‍\nOur history began with a simple mission: to carry on a tradition of reliable plumbing work inspired by our founder’s father, an experienced plumber. Today, we remain committed to helping our community with honest solutions for every job, whether a small repair or a larger project. \n‍\nWe are more than just a plumbing service we’re part of the fabric of St. Louis. We support local families, focus on clear communication, and treat every home with respect and care. Plumbing issues can be stressful, so we emphasize transparency, timely service, and building long-term relationships with our customers.

"Anton’s Air Conditioning and Heating installed a tankless water heater. We are so happy to never run out of hot water. The installers were very professional. I highly recommend Anton’s!"