Commercial plumbing covers the systems that keep an office, restaurant, retail space, medical building, or apartment complex running: grease traps and floor drains, backflow prevention devices, multi-fixture restrooms, boiler and water heater setups sized for heavy use, and the underground or in-wall supply and waste lines that serve a whole building rather than a single unit. It's a different discipline from residential work. A commercial job usually means dealing with code inspections, larger pipe diameters, industry-specific fixtures like triple-basin sinks or floor sinks in a kitchen, and scheduling around business hours so a shop or restaurant doesn't lose a day of revenue.
We track 19 businesses in West Hartford that handle this kind of work. Before hiring one, ask whether they carry commercial liability insurance and are licensed for the scope of the job, whether they've worked on your building type before (a restaurant grease interceptor is not the same as a medical office's specialty waste line), and how they handle emergency calls, since a burst pipe or backed-up sewer line in a commercial building can shut down operations fast. Get a written estimate that separates labor, materials, and any permit fees, and ask about warranty terms on both parts and workmanship.
Our scoring weighs review history, responsiveness, licensing and insurance status, and consistency of work over time, so you're not just guessing based on star counts. See how we build that score on our methodology page, or jump straight to the ranked list of West Hartford plumbers to compare contractors side by side.