Tankless Water Heater Installation

Tankless Water Heater Installation in Highland Park

Rooted in Highland Park Since 1947. Available 24/7 for Tankless Installation.

When it’s time to replace an aging tank water heater or upgrade to a more efficient system, Little Tommy's Plumbing Shop, Inc. is ready to help. We’re a licensed and insured Highland Park plumbing company with roots in this community going back to our family’s plumbing tradition started in 1947. Owner Tommy Mahoney has worked in the trade since 1989, and our team holds State of Illinois backflow certification and has maintained BBB accreditation since 2013. We offer upfront pricing before any work begins, a 100% satisfaction guarantee, and 24/7 availability, including weekends and holidays, with technicians who have arrived on-site in as little as 30 minutes during emergencies.

Homeowners comparing contractors or ready to schedule will find what our customers across Lake County already know: we show up on time, explain the job clearly, and get it done right.

Call us at (847) 443-9115 or send us a message online to schedule tankless water heater installation in Highland Park. We’re available 24/7.

Why Tankless Water Heaters Make Sense for North Shore Homes

Highland Park homeowners upgrading from a traditional tank system gain real, measurable benefits. According to the U.S. Department of Energy, tankless water heaters can be 24 to 34 percent more energy-efficient for households using 41 gallons or less of hot water daily, and 8 to 14 percent more efficient for higher-demand homes. Those figures vary by usage habits, fuel type, and the age of your current equipment, but the direction is consistent: on-demand heating eliminates the standby energy loss that a tank system bleeds around the clock.

One factor worth knowing about in this area: Highland Park’s municipal water registers at roughly 7.3 to 8.2 grains per gallon of hardness, classified as moderately hard. Mineral scale buildup inside a tankless unit is a real maintenance consideration here, and we often recommend pairing a new installation with a water softener or filter system to protect efficiency and extend the life of the unit. Proper sizing matters just as much. We calculate your household’s peak simultaneous flow rate so the unit we install can handle back-to-back showers, laundry, and a dishwasher running at the same time without falling short.

Benefits of installing a tankless water heater include:

Savings: Tankless systems use less energy, which can mean lower operating costs.
Reduced carbon footprint: If you’re looking for a green way to upgrade your system, tankless water heaters offer the chance for you to use less energy and save money in the process.
Endless hot water: With traditional water heaters, you have to wait for the unit to heat the water up as it is transferring it to you. But with a tankless system, your water can be the perfect temperature from the minute you turn it on.
Fewer repairs: Because tankless water systems have fewer parts, they may require less maintenance.
Longer lifespan: Modern tankless systems are often so easy to maintain and repair they can last a lot longer, and don’t need to be replaced nearly as often as traditional units.

We install a full range of water heater options, and we’ll walk you through which type, fuel source, and capacity fit your home before we recommend anything.

Frequently Asked Questions About Tankless Water Heaters

What Are the Energy Savings of a Tankless Water Heater?

One of the primary advantages of tankless water heaters is their energy efficiency. Unlike traditional tank heaters that keep water hot continuously, tankless models heat water on demand, reducing standby energy losses. According to the U.S. Department of Energy, tankless water heaters can be 24 to 34 percent more energy-efficient for homes that use 41 gallons or less of hot water daily, and about 8 to 14 percent more efficient for higher-demand households. These are estimates that vary by usage habits, fuel type, and the age of your current equipment, and they can translate to lower utility bills and a smaller environmental footprint over time.

How Long Can I Expect My Tankless Water Heater to Last?

Tankless water heaters typically outlast traditional tank models by a wide margin. A conventional tank unit lasts about 10 to 15 years; a tankless system can function efficiently for 20 years or more. That extended lifespan comes from fewer mechanical parts and the absence of a constantly full tank that can rust over time. Regular maintenance, including descaling to remove mineral buildup, keeps the unit running at peak efficiency and can help it reach that full lifespan, which matters especially here given Highland Park’s moderately hard municipal water.

Can a Tankless Water Heater Run Out of Hot Water?

A properly sized tankless unit won’t run out of hot water because it heats water continuously as you demand it, rather than drawing from a stored supply. The scenario that causes output limitations is undersizing: if the unit’s flow rate in gallons per minute can’t keep up with simultaneous showers, appliances, and fixtures running at the same time, you’ll feel it. Correct sizing at installation helps prevent that. We calculate your household’s peak demand before recommending any unit so you don’t end up with a system that can’t keep up.

Are Tankless Water Heaters Suitable for Large Families?

Yes, with the right unit. The key variable is flow rate: the number of gallons per minute the heater can deliver matched against how much hot water your household pulls at peak times. Larger families running multiple showers and appliances simultaneously need a higher-capacity unit, and in some configurations, point-of-use supplements can help cover demand at specific fixtures. We work through that calculation during the installation consultation so the system we install fits your actual household, not a generic estimate.

How Does a Tankless Water Heater Affect My Utility Bill?

By eliminating standby heat loss, the energy a traditional tank wastes keeping 40 to 50 gallons of water warm around the clock, a tankless unit can reduce how much energy your home uses for hot water. The DOE-cited efficiency range is 8 to 34 percent depending on how much hot water your household uses daily. Actual savings vary based on your current equipment’s age, whether you use gas or electric, and your daily usage patterns. In most cases, homeowners may see a meaningful reduction in energy costs over the life of the unit.

Little Tommy's Plumbing Shop, Inc. & the Water Heater You Need

From tankless water heater installation in Highland Park to the full range of Lake County plumbing services, Little Tommy's Plumbing Shop, Inc. delivers quality work backed by our family’s plumbing tradition. Our commitment goes beyond the installation itself. We provide follow-up support and maintenance guidance so your tankless system keeps performing at its best, and we’re available to answer questions about usage and upkeep. We’re a locally owned company, not a franchise, and the relationships we build with customers in this community are ones we take seriously.

At Little Tommy’s Plumbing Shop, we offer:

Call now to see what Little Tommy’s can do for you, or contact us online for more information on our tankless water heater installation services.

Continue Reading Read Less

Your Neighborhood Plumber

You Can Count On Us!

“I recently had a plumbing emergency and was incredibly impressed by the service I received. Little Tommy's plumbing was remarkably quick to respond to my initial call and dispatched a technician promptly. Their team was not only efficient in diagnosing and resolving the issue but also maintained a remarkably clean workspace throughout the process. Furthermore, I found their technician to be exceptionally friendly and professional, making a stressful situation much more manageable. I would highly recommend their services for any plumbing needs.”

- Megan S.
I highly recommend Jordan and Little Tommy's.
“It was a pleasure to meet Jordan. He arrived in time. He is friendly, polite and respectful. He solved my problem quickly and explained my options to me. I highly recommend Jordan and Little Tommy's.”

- Deena F.
Always happy with my interactions with Little Tommy's
“Always happy with my interactions with Little Tommy's. Highly, highly recommended. One time when my sump pump backup failed, Tommy was able to face-time me on a Sunday to help diagnose the problem. Last week when my Water Heater was leaking, Tommy was able to come out in 30 mins to quote me a replacement and we were back up and running within the next day. Again, they are highly recommended, and would use again!”

- Dustin G.
No Nonsense Quote
“There is a lot to be said about supporting local folks. And over and above that fact Little Tommy's was OUTSTANDING in all aspects of our encounter. From the friendly young lady on the phone, to the quick response, to Jordan the total professional who accomplished the installation. The price was fair and there was a no nonsense quote. I feel totally confident in recommending Little Tommy's.”

- Mike L.
Great company. Reasonable price. Would highly recommend for plumbing repairs.
“Jordan did a great job. Our cast iron pipe going out from our house to the sewer line had broken. We had a backup of the sewage water inside our bathroom on the first floor and the basement. Little Tommyâ€™s Plumbing company fixed the issue by removing the part of the cast iron pipe that was broken. It was about 4 feet under the ground and installed a PVC pipe. They also obtained the village permit for this work on an expedited basis. Great company. Reasonable price. Would highly recommend for plumbing repairs.”

- Sudhir P.
Best company around here.
“Little Tommy's sent Josh to fix my sink. Delightful experience and result. Josh fixed the problem immediately and then imparted very useful advice and pointers to avert plumbing issues. Best company around here.”

- Steve O.
Great Customer Service & Follow Through
“Tom from Little Tommy's provided me a thorough and timely quote as I am selling my house. The best thing is that he partnered with a tile and a glass company to provide a comprehensive quote. Great customer service and follow through. I would definitely recommend his service.”

- Michael W.
Their service exceeded my expectations!
“Tyler did a fantastic job! It is such a pleasure to do business with a company who is efficient, fast in an emergency, and is trustworthy. I was left feeling they were completely fair and their service exceeded my expectations!”

- Linda S.
Correctly Diagnosed
“They correctly diagnosed and repaired our issue after the first plumber ghosted us and the flooding began again.”

- Craig N.

View All Reviews

Tommy Can Fix It!

Tell us how we can help you.

For 24/7 Emergency Service Please call us at 847-443-9115 for fast and reliable service.

First Name
Last Name
Phone
Email
Address
Are you a new customer?
How can we help you?
By submitting, you agree to be contacted about your request & other information using automated technology. Message frequency varies. Msg & data rates may apply. Text STOP to cancel.
Please note: Emails submitted through this form are not monitored during nights, weekends, or holidays. We will respond to your message on the next business day. Acceptable Use Policy

Why Choose Us?

See What Sets Us Apart

Fast & Reliable Service
We are committed to helping you solve your plumbing needs as quickly as possibly.
Guarantees & Savings
No matter what you hire us for, your satisfaction is 100% guaranteed. We're not happy unless you are.
24/7 Availability
Plumbing can be unpredictable. We'll be there to clean up the mess when the unexpected happens.
Upfront Pricing
Transparency is key and we want to make sure you feel confident in our service and your investment.

Join Our Family of Satisfied Customers
With decades of experience, we're committed to building lasting client relationships.

Read Our Story
Experience Friendly, Reliable Plumbing Services Today
Trust our licensed and insured team in Highland Park, IL, for all your plumbing needs.

Contact Us Now
Need Emergency Plumbing Assistance?
Our 24/7 availability ensures we're there when you need us most.

Get Help Today