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

"Received excellent service on a Saturday morning for an emergency hot water heater replacement. Mike responded immediately upon sending the request. Work began quickly within 90 minutes! Quality work and reasonable cost. We are very pleased on all counts!"

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

"They were very fast to respond to my call and were able to send someone within two hours. The replacement of the hot water heater went well. For the water pipes they use copper crimp fittings instead of soldering so it will be interesting to see how that holds up over the years. My only concern is how they ran the gas line. They use Gastite CSST which is fine, but the CSST is run so it goes downward then back up and then downward again before it enters black pipe that has a moisture trap. It seems to me that if there is any moisture it will end up in the CSST instead of the trap. In addition, there is a pretty good bend in the CSST right before it goes into the trap section. Also, Teflon tape was used on the all the joints instead of joint compound. I think I will get someone from a different company to come in and take a look at it."

"Came early and removed and installed a new water heater within 90 minutes"

"Matt was great. Very responsive, professional and efficient. Installed a new hot water heater for us is no time. And a very fair price!"

"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."

"Louis Schede came to assess my job at my home to replace my hot water heater (at my request), even though he had seen pictures of my hot water heater and knew that it needed to be replaced. His men were extremely professional and skilled - and a pleasure to have in my home. Not only did Louis Schede have the exact same hot water heater that I wanted in stock, during the job, his men detected that I needed a new suspension tank for my oil burner - and managed to replace that as well on the same day - without going outside of my budget. Louis Schede told me that he has been in business for 50 years and it definitely shows. He is a humble guy, and will work within your budget to do the best, possible job. I will be calling Schede & Sons for future plumbing needs. Thank you, Andrea/Greenwich, CT"

"The company responded promptly and provided courteous and orofessional service to repair the leaking pipe at a fair price"

We are a locally owned and operated company that values honesty and integrity and treats your home as if it were our own. We specialize in plumbing and provide unmatched customer service! You will find us paying close attention to the details of each and every project that we are involved with. We look forward to building lasting relationships and guarantee your satisfaction!\n

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.