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Diamond Plumbing & Heating LLC is a Norwich plumbing and heating company with 3.8 stars from 29 ratings on Google. The company's website says it takes on new construction and remodeling projects, including kitchen and bathroom redesigns, and offers 24/7 emergency service. A 2025 customer said their boiler broke down on the coldest day of the year, and that Amilcar and his team replaced the entire boiler and restored their heat within 24 hours. A 2024 customer whose furnace stopped working said the company installed a brand new water heater after hours. In a 2024 review, a customer with a furnace emergency on a very cold night said the company responded quickly, diagnosed the problem and ordered new parts. A 2024 reviewer wrote that Milka ordered the parts and quoted the job, and called it all very reasonable. A 2024 customer in Colchester, CT said the company completed a complicated septic system for a lakeside home, from engineering and installation to landscaping and environmental approvals. In a 2022 review, a customer said the company ran all new plumbing through the entire house in a few days and installed 2 showers. A 2024 customer with a broken water supply line said Amilcar worked with the building department and provided a contact for the utility company, and that the water disruption took two days. An equipmentworld.com article says Diamond Plumbing & Heating LLC of Norwich faces five violations, according to U.S. Occupational Safety & Health Administration records, after one of its employees died following a cave-in.
“Diamond Plumbing & Heating LLC of Norwich faces five violations after one of its employees died following a cave-in June 13 , according to U.S. Occupational Safety & Health Administration records.”
Highly Recommend Diamond Plumbing and Heating! This week, our family found ourselves in a true emergency when our boiler unexpectedly broke down and left us without heat and hot water on the coldest day of the year. We were in a panic, but fortunately, we were able to reach Amilcar at Diamond Plumbing and Heating. He responded quickly, and we could immediately tell that we were in good hands. Amilcar and his team are incredibly professional, knowledgeable, and efficient. They assessed the situation right away, and within 24 hours, they had replaced our entire boiler and restored our heat. We were truly amazed by how quickly they got everything up and running again—especially given the urgency of the situation. If you’re looking for reliable, fast, and skilled professionals, I can’t recommend Diamond Plumbing and Heating enough. They went above and beyond to help us during a stressful time, and we’re so grateful for their expertise and excellent service. You won’t regret giving them a call!
Fantastic! He was prompt at responding to my initial inquiry, made time to fit my service call into his already busy schedule and when he arrived he knew exactly what to do to get my heat back on! So personable and knowledgeable…highly recommend!
I want to take a moment to highly recommend Diamond Plumbing for their outstanding services! Recently, our family faced a challenging situation when our furnace stopped working completely, leaving us without hot water. With four children at home, this was a pressing issue. Fortunately, the team at Diamond Plumbing came to our rescue. They not only responded quickly but also went above and beyond by installing a brand new water heater after hours. Their passion, motivation, and dedication to their work truly stood out, and I am incredibly grateful for everything they have done for us. If you’re in need of plumbing services, I can confidently say that Diamond Plumbing is hands down the best choice. Thank you for your exceptional service!
He gets the job done , very professional and knows what he is doing , he did some heating and plumbing in our home and all I can say is “ FANTASTIC “ I recommend Diamond Plumbing
I was without heat. Diamond plumbing and heating came to check the problem. Without hesitation Milka ordered the parts, quoted the job.all of which was very resonable. Working with me in this busy time and my schedule was able to get me back with heat in no time,.looking for safety making sure all worked well and efficient. His help was also very polite, working well as a team. As always, Diamond Plumbing and Heating came to my rescue I was so very much appreciative of his service once again. Highly recommended. Thank you for your great services.
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1 change recorded — last scanned Oct 30, 2026.
Typical Connecticut range for this kind of work, from regional averages — not a quote from Diamond Plumbing & Heating Llc. Use it to sanity-check bids, then get the real number in writing.
Estimated range
$4,700 – $10,700
Typical HVAC project around $7,700
