4.8
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Complete Tankless Water Heater Services from Universe

Switching to a tankless water heater, often called a continuous water heater, delivers hot water on demand without the limits of a tank.

Universe provides complete tankless water heater services across Long Island:

Universe Home Services offers 24/7 emergency plumbing services when a tankless water heater fails. Contact us today for service anywhere in Nassau and Suffolk County.

(516) 473-0202


Long Island’s Tankless Water Heater Team

Nassau and Suffolk County homeowners call Universe for tankless water heaters because the systems need to be sized, installed, and serviced by a team that understands both the equipment and local water chemistry.

Tankless water heaters have grown in popularity as homeowners look for efficiency and space savings over traditional tank units.

Universe has been installing water heaters across Long Island since 1954 and understands how Nassau County’s hard water affects tankless equipment in particular, where mineral scale on heat exchangers is a real maintenance consideration. Our plumbers size tankless units correctly for household demand and install them to support long service life.

Years in Business

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Emergency Service

Homes Serviced Annually

Why Work With Universe Home Services?

Tankless water heater installation requires a licensed plumber. We perform every job with licensed master plumbers on staff.

Since 1954, our team has been installing and servicing water heaters across Long Island. That history gives us working knowledge of the homes, the water chemistry, and the equipment that performs here.

When a water heater fails, the household feels it immediately. We offer same-day service and fast installation to get hot water restored without delay.

Know what you are paying upfront, with no surprises. We provide free installation quotes so you can make an informed decision without pressure.

A tankless installation is an investment. We offer manageable payment plans to suit your budget and make the upgrade more accessible.

Our Home Comfort Club includes annual service and priority scheduling. Tankless water heater maintenance fits naturally into the membership schedule.

We offer special pricing for military personnel, veterans, and seniors. That keeps quality service accessible across the customers we serve.

Universe is a BBB Accredited Business. Seven decades of plumbing work across Long Island stands behind every tankless water heater we install, repair, or maintain.


An Easy, Stress-Free Scheduling Process

Getting a tankless water heater installed or serviced should never feel complicated.

Universe Home Services makes the process easy from start to finish.

Call us or schedule service online at a time that works for you. Same-day availability and 24/7 emergency service are offered when you need it.

Your plumber evaluates your household’s hot water demand, the existing plumbing setup, and whether gas or electric is the right fit. You receive a clear recommendation before any work begins.

Every installation is tested and commissioned before the visit ends. Your tankless water heater is confirmed to be delivering hot water at the expected flow and temperature.

(516) 473-0202

What Our Customers Are Saying

100% Satisfaction Guarantee

4.8
Based on 7307 reviews
Excellent work. Very knowledgeable, efficient and professional. A pleasure to work with.
The technician was fast, courteous and informative.
Knowledgeable and professional. Made suggestions on how to improve my current a/c system. Took the time to answer our questions.
JP Chumpitaz was phenomenal. Extremely friendly and great service!
On time and finished in 1/2 a day. Very pleased
Easy to speak to and explains all that needs to be done and why and how.
Nick was great!
Rick is knowledgeable and friendly. He clearly explained every step of the process. And when he left, you would never know he was there except for the new working hot water heater. He and his helper took out the old heater and cleaned up as they left.
Technicians on time, very knowledgeable ,friendly , quick and efficient looked at the job then told me what it entailed and the process in how they were going to do the job.
I highly recommend Universe Home Services and
I would definitely use them again
Mike Fitzpatrick from Universe Home Services and his team did an awesome job installing a mini split. it was quick and seamless! the price is also extremely reasonable. thank you!
The team replaced an old waste pipe. They were extremely knowledgeable, professional, courteous, and neat!
Nick was Super friendly, easy to work with. He really knew his stuff. Thanks for everything!!
I had a good experience with this company. They are efficient, reliable and respectful.
When I had an issue with my oil tank and needed to change to gas, they completed the job promptly and did a great job!
Excellent, fast reliable, service and quality of work. Knowledgeable, courteous service technician and phone service. I called at 8:00 and job was finished by 9:30. I will highly recommend.
James did a very good job in evaluating the problem with our boiler and professionally explained what needed to be done to resolve the issue.
BRIAN was great . Fixed our problem when others could not . We are now a part of the Universe family. No one else will ever come to our house for plumbing issues but Universe Thank you. You were great . You are an asset to the company for sure . 5 stars left . Thanks buddy.
JP came to my house. Work performed was clean, professional and I was very satisfied that he was able to upgrade my heating system and install a new hot water heater.
Steve was Awesome
AC maintenance visit. Tech James Richuitti very professional and courteous
Very good and fast
Great service. Quick and reliable.
Anthony was very professional
Brandon and Brian were great,explained everything and gave plenty of options
Frank was very professional and friendly..Joe cartelli.
Excellent professional service!!

Universe Home Services truck stocked for HVAC, plumbing, and electrical repairs

(609) 799-3434

Tankless Water Heater Installation

Installing a tankless water heater is a meaningful upgrade for Long Island homes looking to save space and reduce energy usage.

Universe installs tankless water heaters across Nassau and Suffolk County, including gas and electric models.

Tankless units are significantly more compact than traditional tank water heaters. That compact size frees up valuable space in your utility room, basement, or closet.

Tankless water heaters only heat water when it is needed, which eliminates the standby losses of a traditional tank. That efficiency shows up as lower utility bills month after month.

A correctly sized tankless system delivers hot water on demand, without the wait for a tank to reheat. That makes simultaneous fixture use possible in homes where the tank used to be the bottleneck.

Reduced energy usage makes tankless a meaningfully greener choice than a traditional tank. Homeowners focused on long-term environmental impact appreciate the efficiency.

Tankless Water Heater Replacement

Tankless water heaters are known for their durability, and they often last more than 20 years. When a unit does reach the end of its service life, replacement is the right call.

Universe handles tankless water heater replacement across Nassau and Suffolk County.

Tankless systems typically last 20 years or more. A unit past that window is a candidate for replacement, particularly if performance has declined or repair costs are mounting.

When the cost of a significant repair approaches what a new unit costs installed, replacement is the better investment. A new unit comes with manufacturer warranty and updated efficiency.

A tankless water heater sized for a smaller household or different fixture count may struggle to keep up as usage changes. Replacement with a correctly sized unit restores reliable flow.

Major plumbing work or a kitchen or bathroom renovation is a natural time to replace and reintegrate the tankless water heater. We coordinate the work as part of the larger project.

Tankless Water Heater Repair

Tankless water heaters can develop common issues including mineral buildup and ignition problems, which may require professional attention.

Universe diagnoses and repairs tankless water heaters across Nassau and Suffolk County. We can help with:

Nassau County’s hard water deposits mineral scale on tankless heat exchangers, which reduces efficiency and eventually affects flow. We descale the unit and restore performance.

A tankless unit that will not fire or cuts out mid-use has an ignition system, gas supply, or flame sensor issue. We diagnose the cause and complete the repair.

Temperature swings or a unit that delivers only lukewarm water has a flow sensor issue, a gas supply problem, or a component that needs attention. We identify the cause and correct it.

Modern tankless units display error codes when they shut down. We interpret the codes and resolve the underlying issue before the unit cycles through the same failure again.

Family dancing together in living room


Green Universe Van parked on the side of residential street

(516) 473-0202

Tankless Water Heater Maintenance

Tankless water heaters require routine maintenance to continue performing at the efficiency and flow they were installed to deliver.

Universe provides tankless water heater maintenance across Nassau and Suffolk County.

Flushing a tankless water heater prevents mineral buildup and keeps the system running efficiently. On Long Island, where water is hard, annual flushing is the standard recommendation.

Inlet filters, sensors, and valves need periodic inspection to keep the system performing. Maintenance catches early wear before it becomes a no-hot-water event.

Gas tankless units require proper combustion and venting for safe, efficient operation. We verify both as part of the annual maintenance visit.

Scheduling maintenance before peak heating season or heavy-use periods confirms the unit is ready for the demand. That proactive service reduces the chance of a failure when hot water is needed most.

Other Solutions for Your Home from Universe Home Services


Choose Universe Home Services for Tankless Water Heater Services

When it comes to tankless water heater services on Long Island, Universe Home Services brings over 70 years of experience to every visit.

As your trusted partner, we combine rapid response with quality service. Contact us online or call to get on the schedule.

Universe Home Services Technician near open van doors

Tankless Water Heater FAQs

How long does a tankless water heater last?

Most tankless water heaters last more than 20 years with proper maintenance. That is significantly longer than a traditional tank, which typically lasts 10 to 12 years.

Will a tankless water heater supply enough hot water for my home?

A correctly sized tankless unit supplies plenty of hot water for the household. Sizing depends on flow rate demand and simultaneous fixture use, which we evaluate during the consultation.

Is it expensive to switch from a tank to a tankless water heater?

Switching to tankless involves equipment and installation costs that are typically higher than a straight tank replacement, but the efficiency gains and longer service life often offset the difference over time. Financing options are available.

How often does a tankless water heater need maintenance?

Annual maintenance is the standard recommendation, especially on Long Island where hard water accelerates scale buildup. Flushing and inspection keep the unit performing at the level it was installed to deliver.

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