Friendly free advice... Mayvin Plumbing, Heating and Refrigeration owners Ken and Colette Vincent have run the one-stop mechanical services and installation business since 1994. Before you start your home renovation, stop by and check out their extensive line of parts, pieces and fixtures for the do-it-yourselfer and get some friendly, free advice. Ask about their Lennox heat pumps. For those needing assistance, Mayvin has licensed tradesmen available.