Black Diamond Plumbing & Heating

When a water heater burst on a Friday night, Black Diamond Plumbing & Heating had a replacement in by Saturday morning. That's the kind of call this Winthrop shop keeps getting — a boiler that fails during the coldest weekend of the year, a pipe letting go behind a ceiling, a stove hissing gas at dinnertime. Reviewers keep landing on the same detail: someone actually answers the phone, and someone actually shows up. Twenty-nine reviews on Google average five stars, and the pattern has held through 2026 — seven reviews in the first half of the year, none of them negative. One recent account describes water pouring through a basement ceiling after a pipe burst; Mike was at the door within 20 minutes on a Saturday, helped get a cleanup crew arranged, then came back once the demolition was done to track down and fix the actual leak the same day. Another recent review is from a landlord managing eight rental condos who says the company worked every unit around a tight deadline, calling the relationship different from other vendors used in the past. When a boiler quit overnight during the year's coldest stretch, the callback came fast enough to have heat running again before the weekend was out. The crew that shows up is small. Recent reviews describe Mike and "his team" handling jobs directly rather than dispatching a rotating roster of technicians — consistent with the fast, personal callbacks, but worth keeping in mind for a project that needs more than one crew on site at once. Its Massachusetts plumbing license (4785-PL-C) is active, worth confirming for anything that needs a permit pulled. This is a fit for the plumbing-and-heating emergency that can't wait — a dead boiler in the middle of winter, a burst pipe, a gas leak — and for landlords who'd rather call one number across several units. For anything non-urgent, it's worth asking about scheduling lead time given the size of the crew.