Serving Nassau County, Locust Valley and beyond
Tankless Water Heater Installer Nassau County
Considering an upgrade to a tankless water heater for your home? L. Graziose Plumbing Heating & Cooling offers comprehensive tankless water heater installation services to enhance your home's efficiency and water heating capabilities. Tankless water heaters provide a continuous supply of hot water, tailored to meet the demands of your household while also reducing energy consumption. At L. Graziose Plumbing Heating & Cooling, our team ensures a seamless tankless water heater installation process, from selection to integration, prioritizing your home's specific needs. For an efficient and reliable solution to your hot water needs, consider transitioning to a tankless system with L. Graziose Plumbing Heating & Cooling.
Ready to experience the benefits of endless hot water? Call (516) 614-4071 for your tankless water heater installation.
Nassau County Tankless Water Heater Installation Call for More Information Today!516-614-4071
They are always fast to come whenever we have any issues!
Celeste Gullo
T"Always a Pleasure"
Always a pleasure, and the reliability and professionalism is very much appreciated.
Twinmooncindy
a"Prompt, Professional, and Clear"
Prompt, professional, and clearly explained the issues.
alex delucia
M"Jordan and Kyle Are Excellent"
Professional, fast, and friendly.
Menachem Mandell
S"Outstanding Work"
From start to finish, the team was professional, on time, and incredibly thorough.
Svetlana Miller
W"Very professional and reasonably priced"
Very professional and reasonably priced. Great work by Jordan.
Wing BOY
C"Daniel Is a Man of His Word"
Daniel is a man of his word.
Christopher John
T"They came out on Thanksgiving Day"
They came out on Thanksgiving Day and saved what would have been a terrible weekend.
Todd Schaffhauser
K"Excellent Service"
Excellent service. Arrived quickly and completed quickly!
Kon Lamb
S"Love the services Graziose provides"
Nicole keeps the lines of communication working so you know when help will arrive.
Susanne Fordham
K"Great Service!"
Scott is a very knowledgeable and experienced professional.
Kevin Doherty
J"Graziose Plumbing Did an Excellent Job"
Every job was done professional and with a smile.
Jeanine Dimenna
C"So pleased with Graziose Plumbing"
We called with an emergency leak and they were very quick to send someone over.
Chris
C"Extremely knowledgeable and professional"
They were extremely knowledgeable and professional. They came over and fixed the issues with no headache.
Christian Sodano
C"Graziose Is the Best in the Business"
Within 30 minutes there was a plumber at my door by the name of Jordan. The service was amazing.
Christian Shishkoff
K"I Have Been Using Graziose for Years"
Scheduling an appointment is easy and everyone there is very helpful and responsive.
Kissner Diane
V"Top Plumbing Company, Great Crew"
Top plumbing company, great crew.
Vito Labbate
B"Extremely professional from start to finish"
The workers were extremely clean and respectful.
Brian Keaveney
C"Good communications and very thorough"
They were able to fit us in on short notice and found three leaks when we thought there was only one.
Chris LaMere
R"Excellent service as always!"
Clean, polite, and all costs and options explained up front.
Rima Muth
F"Nestor and team were great"
They came promptly, took the time to figure out the issue and solved it!
Faiyaz Rafik
K"Nick was terrific today"
Nick was terrific today, very detailed and patient explaining to my parents the repairs.
Kari
E"Excellent work!"
Polite technician. Arrived promptly when expected.
Edith ODonnell
F"Very professional and quick service"
Nicole quickly helped coordinate a technician to come right away to help get us out of a bad situation.
Florence
C"10/10"
They fixed a leaking water main line in less than two hours.
Chip Gresalfi
S"The experience was exceptional"
When Nester and Chris arrived to my home, they were extremely professional and courteous.
Sergio M.
C"Nester and Scott were great"
Definitely a strange issue with my boiler, but they were able to figure it out.
Christopher Dara
M"Great Client Service"
They arrived here fast and wouldn't leave until the problem was solved, although complex.
Mike Da Billy Club
K"The single most professional tradesman"
Scott came and was the single most professional tradesman I have ever had at my house.
Kevin Brady
T"Very Polite, Friendly, and Affordable"
Very polite, friendly, and affordable. They did great work.
Ted Johnson
So Grateful and Highly Recommend
They are always fast to come whenever we have any issues! Our hot water heater broke and they replaced it the same morning and got our hot water back on! So grateful and highly recommend.
Celeste Gullo
Always a Pleasure
Always a pleasure, and the reliability and professionalism is very much appreciated.
Twinmooncindy
Prompt, Professional, and Clear
Prompt, professional, and clearly explained the issues and our options.
alex delucia
Jordan and Kyle Are Excellent
Jordan and Kyle are excellent, professional, fast, and friendly. Most importantly, they do excellent work.
Menachem Mandell
Outstanding Work
5 Stars – Outstanding Work.
I recently had L. Graziose Plumbing Heating & Cooling completely update the plumbing in my bathroom, and I couldn’t be happier with the results! They installed a new shower body and upgraded all the valves for better pressure and reliability—no more drips.
From start to finish, the team was professional, on time, and incredibly thorough. They provided upfront pricing and worked efficiently without unnecessary disruptions.
I highly recommend L. Graziose. Special thanks to Nicole, Scott, Hector, and Kevin! We’ll definitely call them for future needs.
Svetlana Miller
Very professional and reasonably priced
Very professional and reasonably priced. Great work by Jordan. Love the new faucet.
Wing BOY
Daniel Is a Man of His Word
Daniel is a man of his word. I'll see you next week. - C
Christopher John
They came out on Thanksgiving Day
They came out on Thanksgiving Day and saved what would have been a terrible weekend.
Temporarily fixed the shower and came back to finish the job when I had the new faucets.
Jordan was awesome and explained everything.
Thanks L. Graziose Plumbing and Heating.
Todd Schaffhauser
Excellent Service
Excellent service. Arrived quickly and completed quickly! Will call again!
Kon Lamb
Love the services Graziose provides
Love the services Graziose provides. They make scheduling easy. Nicole keeps the lines of communication working so you know when help will arrive. They repaired our bathroom toilet with the right parts, which they had with them. I have always appreciated Graziose for their responsive and capable services!
Susanne Fordham
Great Service!
Great service! Scott is a very knowledgeable and experienced professional. He was here on time and my plumbing service was done promptly and properly! I highly recommend Graziose Plumbing to anyone seeking a quality job at a reasonable price.
Kevin Doherty
Graziose Plumbing Did an Excellent Job
Graziose Plumbing did an excellent job in helping to get Jeanine's American Bistro open. We are very grateful that they were there to complete all the plumbing issues with the building; they always arrived on time. Every job was done professional and with a smile. Highly recommend Graziose Plumbing. Nicole in the office was great to work with; she understood everything we needed and did all our paperwork, which was a tremendous help to us. She also coordinated all the inspections, times, and dates. Thank you, Nicole!!!!!
Jeanine Dimenna
So pleased with Graziose Plumbing
So pleased with Graziose Plumbing. We called with an emergency leak and they were very quick to send someone over. The technician, Jordan, was extremely professional and detailed in explaining the problem and how he was going to fix it. Certainly alleviated the stress and worry. Price was very reasonable. Thank you!
Chris
Extremely knowledgeable and professional
I recently had an emergency at my house, and the plumbing company I normally use was not responding. So I reached out to Graziose Plumbing, and they were extremely knowledgeable and professional. They came over and fixed the issues with no headache. I have nothing but great things to say about my experience with them, and they will be the company I use going forward. Thank you, guys!
Christian Sodano
Graziose Is the Best in the Business
I had a leak in my ceiling, and within 30 minutes there was a plumber at my door by the name of Jordan. He found the problem and fixed it. The service was amazing. Graziose is the best in the business, I highly recommend them! Thank you, Daniel Graziose, for everything.
Christian Shishkoff
I Have Been Using Graziose for Years
I have been using Graziose for years! Scheduling an appointment is easy and everyone there is very helpful and responsive. Some plumbing problems are emergencies and I can always count on them! All work done is professional and well done.
Kissner Diane
Top Plumbing Company, Great Crew
Top plumbing company, great crew. I was in need of a fast solution and they provided it at a competitive price.
Vito Labbate
Extremely professional from start to finish
Graziose Plumbing was extremely professional from start to finish. The workers were extremely clean and respectful. The job was completed flawlessly without any issues. I would highly recommend them again.
Brian Keaveney
Good communications and very thorough
They were able to fit us in on short notice and found three leaks when we thought there was only one. Good communications and very thorough. Would use again.
Chris LaMere
Excellent service as always!
Excellent service as always! Clean, polite, and all costs and options explained up front.
Rima Muth
Nestor and team were great
Nestor and team were great. They came promptly, took the time to figure out the issue and solved it! Thank you!
Faiyaz Rafik
Nick was terrific today
Nick was terrific today, very detailed and patient explaining to my parents the repairs. The woman that answers the phones in the office is kind and extremely helpful. Thank you - we are so glad to have the plumbing issues fixed!
Kari
Excellent work!
Excellent work! Polite technician. Arrived promptly when expected. Courteous and efficient service.
Edith ODonnell
Very professional and quick service
I recently had an emergency during a new washer installation that resulted in a part of a water pipe snapping off. Nicole quickly helped coordinate a technician to come right away to help get us out of a bad situation, and Jordan did everything he could to help get our water supply back up in no time. Thank you to the Graziose team for their very professional and quick service!
Florence
10/10
10/10
They fixed a leaking water main line in less than two hours.
Incredible.
Chip Gresalfi
The experience was exceptional
I recently called L. Graziose Plumbing for an unplanned repair, and I must say, the experience was exceptional from start to finish.
From the moment I contacted the office, Loraine managed to accommodate me in their schedule despite the urgency of the situation, which I greatly appreciated.
When Nester and Chris arrived at my home, they were extremely professional and courteous. They prepped the work area, explained what needed to be done, and once the repair was completed, they cleaned the entire space—you would’ve never guessed that anyone was even there.
Overall, I had a great experience with L. Graziose and will definitely be calling them going forward.
P.S.: Everything works great!
Sergio M.
Nester and Scott were great
Nester and Scott were great. Definitely a strange issue with my boiler, but they were able to figure it out and had the part needed readily available. Highly recommend.
Christopher Dara
Great Client Service
Great client service. Worked with Danny and Jordy. They arrived here fast and wouldn't leave until the problem was solved, although complex. Would definitely recommend their services to anyone looking for an honest service for any plumbing or heating needs. Thanks again.
Mike Da Billy Club
The single most professional tradesman
We had a copper pipe elbow get a pinhole and leak up in the ceiling for 3–4 days before it became noticeable. The ceiling let go due to the weight of the water. I called my plumber that I have used for years. I left a message on their emergency line. No call back. We started calling around. It was Saturday at 5 p.m. Scott came and was the single most professional tradesman I have ever had at my house. Scott developed a plan—and then executed it flawlessly! He got everything fixed and got our water turned back on! Thanks so much, Scott!
Kevin Brady
Very Polite, Friendly, and Affordable
I just moved into the area and was shopping for the right company. I liked L. Graziose Plumbing the best. Very polite, friendly, and affordable. They did great work; we will be using them in the future.
At L. Graziose Plumbing, Heating & Cooling, we’ve proudly served Locust Valley and surrounding areas since 1973. As a multi-generational, family-owned company, we deliver reliable plumbing, heating, and cooling services with a focus on courtesy, integrity, and professionalism for every home and business we visit.
Why Choose Us:
Family-owned and operated since 1973
Highly trained, professional technicians
Full-service plumbing, heating, and cooling solutions
Clean, respectful work in your home or business
Honest recommendations and quality workmanship
Residential specialists serving Locust Valley and nearby areas
24/7 Emergency Plumbing Support
Fast response for burst pipes, leaks, and urgent repairs anytime.
Upfront Pricing, No Surprises
Know the full plumbing cost before work begins—no hidden fees.
Clean, Respectful In-Home Service
Technicians protect your home with careful, tidy workmanship.
Trusted Local Plumbers Since 1973
Decades of family-owned plumbing expertise you can rely on.
Frequently Asked Questions
Is a gas or electric tankless heater better?
It depends on your home’s setup and energy efficiency needs. Gas units generally have a higher flow rate, while electric units offer easier installation and lower upfront costs.
Are tankless water heaters expensive to install?
While the initial installation cost may be higher than traditional heaters, tankless systems can save on energy bills over time, making them cost-effective in the long run.
What is a tankless water heater?
A tankless water heater heats water directly without a storage tank. It provides hot water on demand, which means it only heats water when you turn on the tap, resulting in energy savings.
How does a tankless water heater work?
When you turn on the hot water tap, cold water travels through a pipe into the unit, where an electric element or gas burner heats the water, providing a constant supply of hot water.
