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Top-Rated Tankless water heater installers in University City - Updated Nov 2026

Avatar for MAPLEWOOD PLUMBING
MAPLEWOOD PLUMBING
4.8(
337
)
Tankless Water Heater - Install

Serving University City, MO and surrounding areas

Approved

In business since 1985

Free estimates

Warranties offered

"Jacob thoroughly looked over everything; water lines, gas line, igniter, gas valve, connections, etc.. He took the time to make sure everything was working properly and even educated me on a few things I didn't know."
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+7

1 neighbors recently requested a quote
Recommended by95%of homeowners
Avatar for Brighthouse Plumbing, LLC
Brighthouse Plumbing, LLC
4.9(
9
)
Tankless Water Heater - Install

Serving University City, MO and surrounding areas

Approved

In business since 2000

Credit card accepted

Offers commercial services

"I hired this company to extend the natural gas in my house and would definitely recommend them. I felt that the plumber who did the installation really knew what he was doing and seemed like a great guy. The installation went well and the price was fair."
BrightHouse Plumbing
Water Fountain and Fill Station
Bathtub
Shower
Backflow

+1

Response time10 hrs
Recommended by100%of homeowners
Avatar for Mr. Rooter Plumbing of St. Louis
Mr. Rooter Plumbing of St. Louis
4.2(
351
)
Tankless Water Heater - Install

Serving University City, MO and surrounding areas

Approved

In business since 2017

Free estimates

Emergency services offered

"Needed install for a kitchen faucet with corroded bolts. Prompt reply, friendly service. Cost was high, but as quoted--no surprises, even though it took him over three hours to get the old fixture out and install the new one. Would definitely work with them again."
Mr Rooter Neighborly Hub for Home Services
Courteous, Uniformed Professionals.
Keep your home clean with mats and shoe covers.
Provide a price before we start.
Revolutionary Drain Cleaning Services

+7

Response time1 day
102 neighbors recently requested a quote
Recommended by86%of homeowners
Master Remodel & Construction
4.7(
18
)
Tankless Water Heater - Install

Serving University City, MO and surrounding areas

Approved

In business since 2017

Free estimates

Customers say: Quick response

"Jacob and Cody have been amazing to work with. We originally hired them to repair our stairs and have since contracted with them to install our kitchen tile floor, install electric in our kitchen island and to repair some of our drywall. Their team is very professional, their estimates are accurate and they do quality work. We plan to hire them again when we remodel our bathrooms."
Car port
Car port
Car port
Bathroom remodel
Bathroom remodel

+11

Response time2 hrs
Recommended by100%of homeowners
Avatar for Winnovation Plumbing and Drain
Winnovation Plumbing and Drain
5.0(
7
)
Tankless Water Heater - Install

Serving University City, MO and surrounding areas

Approved

In business since 2023

Free estimates

Credit card accepted

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.

Water heater install
Shower Valve replacement
Shower Valve replacement
Stack replacement!
Stack replacement!

+3

16 neighbors recently requested a quote
Avatar for Anton's Plumbing, Heating/Cooling & Energy Experts
Anton's Plumbing, Heating/Cooling & Energy Experts
4.7(
516
)
Tankless Water Heater - Install

Serving University City, MO and surrounding areas

In business since 1979

Free estimates

Emergency services offered

"Steve arrived on time, quickly diagnosed the problem with the water heater, gave me options to fix/replace without trying to steer me to one option or the other, and answered my questions. I opted for replacement and he got the appointment set up for the next day so we wouldn't be without hot water any longer than necessary."
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+18

Response time12 hrs
Response rate100%
3 neighbors recently requested a quote
Avatar for Mayo Plumbing Co
Mayo Plumbing Co
4.8(
481
)
Tankless Water Heater - Install

Serving University City, MO and surrounding areas

In business since 1990

Free estimates

Emergency services offered

"Great! I called Mayo as a new customer (my former plumber had retired). John called me after office hours from his cell phone before he had even returned to his office and had a chance to review my request; we discussed my situation and he said he would work me into his schedule. They kept in touch and updated expected arrival time. When John arrived, he was very personable, professional and efficient; he even leak-checked fittings for furnace and water heater, in addition to the new fitting he installed for the dryer. I like small family-owned businesses and would hire them again in a minute!"
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+3

Recommended by96%of homeowners
Avatar for Vitt Heating & Air Conditioning Co Inc
Vitt Heating & Air Conditioning Co Inc
4.7(
161
)
Tankless Water Heater - Install

Serving University City, MO and surrounding areas

In business since 1954

Free estimates

Emergency services offered

"Jerry and Matt came out and was professional, knowledgeable, and courteous. Vitt Heating and cooling couldn’t have sent out two better installers. Them 2 guys made me a customer for life , they went above and beyond my exspectations"
Military Discounts (retired & active)
Senior Citizen Discounts
Residential HVAC
Multifamily & Commercial Installation & Maintenance
Professionally Installed Ducts

+6

Response time3 days
Response rate100%
Recommended by91%of homeowners
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