Get matched with top tankless water heater repair pros in Port-costa, CA

"I have what turned out to be a 30 year old water heater replaced by this great company and they did it the same day of the quote. The installer had the water heater I wanted on the truck and did an excellent job of putting in the new unit, cleaning up and even replacing copper flex tubing and installing a new overflow pipe out of copper as well, no additional cost. This company specializes in water heaters and couldn't do any additional work on supply lines and they clearly state that on their website. I didn't need that type of additional work."

"Pedro installed a tankless water heater for me. Very professional and reasonable. Would hire him again."

"Jaleen from Albert Nahmans is top notch , diagnosed the issue with an old furnace , fixed it and made recommendations for repairs and or replacement . A huge thank you!!"

"They fixed a major water leak and installed a new water heater all in one day. They were prompt and did a neat install. I can recommend them."

"Confirmed the status of the heater and gave me peace of mind with the knowledge."

Since 1999, Hassler Heating and Air Conditioning has helped East Bay homeowners stay comfortable with energy-efficient heating and cooling solutions built to last. We specialize in full system replacements, heat pumps, ductless mini-splits, and high-performance home upgrades designed to lower energy costs and improve year-round comfort.\n\nHomeowners choose Hassler for honest recommendations, expert system design, and clean, professional installations. Whether you need a fast repair or a complete system upgrade, our team focuses on long-term solutions—not quick fixes.\n\nServing Alameda, Contra Costa, and Marin counties, we’re committed to doing the job right the first time, with quality workmanship you can trust.\n\nCall today for expert service and a smarter, more efficient home.

"Michael Smith gave us a very excellent service. Weâ re so happy to have him fix our big problem with the water leak infront of our house. He has really a great knowledge and the best quick service performance.. We truly appreciate your help. More power to the company!"

"Mike was professional and fixed both showers, noting that the shower pipe valve for our new shower/tub had been installed incorrectly. He was very pleasant and professional. In fact, we had a toilet overflow and ceiling water leak hours after he left -- he was responsive over the phone and we were able to diagnose the problem. He even texted me afterwards to see if there was still a problem (there wasn't). Would use Mike again in a heartbeat. He is our plumber of choice moving forward."

"This was the company I was assigned to with my home warranty. They repaired a toilet pump and hot/cold water valves/ pipes to my washing machine.The company communicated very well and completed the job in a timely manner. The technician was very nice and informative. Highly recommend."

"Diego was very efficient and professional. We bought a new water heater from Home Depot, and he let us know everything we needed beforehand so that his work was really quick. He demolished our old water heater stand so that we can have it replaced with a new one also. Thanks, Diego!"