Black Diamond Plumbing & Heating

Twenty-nine Google reviews and every one of them is five stars, and Black Diamond Plumbing & Heating earns them by showing up when things are actually breaking — a burst water heater after hours, a pipe pouring through a basement ceiling on a Saturday, a 25-year-old boiler spewing carbon monoxide. The company works out of Winthrop and its Massachusetts plumbing license is verified active; homeowners talk about Mike, and occasionally his teammate Dave, showing up at the door within the hour. The pattern holds across the record: one customer's pipe burst through a ceiling and Mike was at the door within 20 minutes, arranged cleanup, then came back once the demo work was done to track down and fix the actual leak. Another, with a burst water heater on a Friday night, had it replaced by Saturday morning. Reviewers describe the same speed for smaller calls too — a toilet fixed in under an hour, a hot water valve replaced in ten minutes for a family with newborn twins. The heating side gets equal attention: in a 2024 review, a homeowner described getting three quotes after their old boiler started spewing carbon monoxide and picking Black Diamond for a new high-efficiency unit, while another that same year called the boiler swap itself "remarkable," done with a patient, step-by-step explanation. Several reviewers mention Mike walking through jobs by phone, photo, or video while they were at work, and a property owner managing eight condo units cites the same responsiveness across every unit. There's little to flag here — the reviews are uniformly positive, pricing comes up repeatedly as fair and transparent rather than as a complaint, and the license checks out with the state. The one thing worth confirming directly is scope on renovation-adjacent work: sinks, toilets, and gas lines come up during basement and condo renovations, but this reads as a plumbing-and-heating shop first, not a remodeling outfit. For an emergency call — a burst pipe, a dead boiler in the cold, a gas leak — the record points to a small, responsive crew that picks up the phone and shows up fast, with clear explanations along the way. Confirm current pricing for the specific job before booking.