Get matched with top water heater installers and replacers in Cos Cob, CT

"Talk about Top Quality service! From the professionalism of Daniel, to the great job done by Humberto and Ernest. I couldn't have had a better experience in a bad situation. They replaced our steam boiler, and our water tank and did a wonderful job. We have a warm house again thanks to them! Humberto, Ernest, I take my hat off to you!"

"Yes, one day install conversion from tank electric to tankless gas with water softener "

"Aldo replaced an ancient water boiler neatly and quickly. "

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

"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."

"Finding a reliable contractor is tough these days, but I got lucky hiring Chris. He and his son arrived on time, replaced my electric hot water tank, fixed a leaking guest bathroom sink, and cleaned up afterwards. Chris is a true professional with a great attitude excellent work at a fair price. I highly recommend him."

"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."

"We had a standard water tank that failed on Friday July 1. I reached out to Matt with water issues from the tank, but more importantly- to find out options for a replacement. He convinced me to go with a popular and reliable tankless system. I called him at 7:40am, the parts were delivered at 11am and Matt came by at 1pm. By 3:30pm, our new system was operational. Going into a holiday weekend - that was fantastic service!"

"I spoke to the company owner Lou Schede on Sunday and we scheduled one of his service technicians to meet me on Monday. I informed him I would like to receive at least one hour notification prior to the person arriving for the appointment. The next day I received a text from the service technician named Kelroy. He later called me an hour in advance of arriving for the service call as Lou had committed to do. Kelroy and his helper went on to diagnose and repair the furnace issue in timely manner. I appreciate, he was making efforts to repair the furnace on this first service visit rather than replace unneeded parts or require an additional (more costly) follow up service visit."

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.