Get matched with top tankless water heater repair pros in Old Greenwich, CT

"What a great experience! I needed a water heater replaced ASAP, and Mike and his team replaced the heater quickly, with no issues, and at less than half the price of the next lowest bid. I'd highly recommend Mike's Plumbing."

"It went very well! Doug was on time, friendly and professional. He found a problem which we will have repaired soon."

"Professional, courteous, responsive, and fair price. I highly recommend and will use them again. E and R Plumbing was 1 of 3 companies recommended to me by HomeAdvisor and I contacted them because they had the best reviews. Almost immediately, I received a call from Rich and while he was on the phone, he asked me to send over pictures of my 16 year old Water Heater Tank that needed to be replaced. He quoted me a fair price for both a Tank and Tankless water heater and I decided to go Tankless. Rich and two colleagues showed up the next morning, removed the old Water Heater Tank and built out a plywood mount to install a new tankless water heater directly behind where the old tank was, taking up less space. Rich and his colleagues completed the job exactly as described, and Rich called later that afternoon to make sure everything was running great!"

"Oct. 6 2025 it went quick. I received an estimate of The job first. The work was done correctly. It didn't take long. If I need plumbing service again. I would contact Cassidy plumbing & Heating."

"This company is very professional and clean worker. They explain everything and give fair prices. I look forward to hiring him to update my bathroom"

"The firm responded immediately to my inquiry and arrived at the scheduled appointment date, assessed the necessary repair, went to the closest plumbing supply house and obtained the necessary materials and returned promptly that day to make the corrections. The crew was courteous and professional."

First String Plumbing, Heating & Cooling is built on over four decades of hands-on, master-level experience paired with modern equipment, straightforward pricing and a commitment to serving our neighbors near and far.\n\nWe believe every homeowner in Connecticut and New York deserves a team they can count on whenever they need help. When the lights are at their brightest and all eyes are on us, we will always do what is right and that commitment never fades.

Bluefrog Plumbing + Drain of Stamford is a family-owned and operated business committed to putting customer care at the heart of every service we provide. We employ only highly trained, experienced plumbing professionals—so you can feel confident your home is in expert hands.\n\nFrom your first call to the final follow-up, we go above and beyond to ensure you feel informed, supported, and valued throughout the entire process. Our team provides in-person assessments with clear, up-front pricing and takes the time to explain your plumbing issue and all available solutions.\n\nTo help you save even more, we also offer our Bluefrog Membership Program—just $99 per year, giving you access to 15% off services, priority scheduling, and other exclusive benefits designed to keep your home protected year-round.\n\nWe proudly stand behind our work with a satisfaction guarantee and dedicated customer support. Experience plumbing the Bluefrog way—professional, transparent, and centered around you.

"I cannot recommend Mark more! We called him for a dishwasher installation and pipe repair. He quoted us reasonably - and was generous with his work and time when what we thought was a simple job turned out to be much more complicated. He was absolutely a pleasure to work with - communicative about the issue and his solution, flexible with scheduling, and just an all-around nice guy. We will not be hesitating to call him in the future - our go-to-guy for all plumbing needs."

"Repairman, Andrew, came and located the problem. The ignitor had burned out, so the burners would not light. Andrew did not have the part in his truck but was able to fit in a used part from another furnace to give me heat until he got the other part. I got a call the next day and scheduled a time to put in the exact part. Again, repairman was within the stated time window. Heat working well."