MFM Plumbing and Heating (trading as MacKinnon Plumbing and Heating)

Two names, one small shop. The company's own site says MacKinnon Plumbing and Heating; the neighbors who pass its number around call it MFM, after Mike MacKinnon. It works out of Marshfield and covers plumbing, heating and refrigeration — repair, replacement and maintenance — with staff the company describes as licensed plumbers carrying over 20 years of industry experience. That description is the company's own, not something confirmed against the state registry here. The written trail is thin, but what's there is direct. In late January 2026, a Marshfield neighbor on Nextdoor passed along MacKinnon's name and number with two judgments attached: "he is great and very reasonable." One voice, not a pattern, and no published customer reviews sit behind it. Two things are worth pinning down before you call. Ask for the Massachusetts plumbing licence number and check it yourself, since the licensed-plumber description comes from the company rather than from a registry. And because the neighbor's endorsement rested partly on price, get the scope and the number in writing. Best fit for a Marshfield or South Shore homeowner who would rather hire the small local outfit a neighbor vouched for than a name off a directory — with the understanding that the vouching, so far, is a single voice.