OAM Plumbing

OAM Plumbing is a Massachusetts plumbing, heating and gas company led by a technician customers call Olsi, whose Massachusetts plumber license is registered but currently shows as expired in the state registry. All 22 reviews on file are from 2025, and nearly every one is five stars. In a November 2025 review, a Saturday-night boiler heating emergency had Olsi on-site within an hour after several other companies couldn't help; in a December 2025 review, a customer described a fast, calm response to a plumbing emergency, with everything under control within minutes. Several November 2025 reviews describe water heater and boiler installations completed quickly and cleanly, and a December 2025 review described an oil tank issue diagnosed and repaired, with the system confirmed safe before Olsi left. A number of reviewers specifically praised fair, transparent pricing with no surprise charges. One thing worth confirming directly: the state's plumbing license registry shows OAM Plumbing Gas Heating LLC's license as expired, even though the company's website describes its lead technician as a Master Plumber with over 20 years of experience, and multiple reviewers refer to him the same way. A homeowner should ask to see current, active licensing before hiring for licensed plumbing or gas work. For plumbing repairs, water heater and boiler installation, and gas or heating-system work, OAM has a deep and specific run of positive 2025 reviews. Given the license status shown in the state registry, confirming current licensing directly is worth doing before booking, especially for gas or heating-system work that requires an active credential.