A Licensed Maryland Master Plumber, Based in Baltimore

Built on 15+ Years Under Baltimore Streets

ProStream Plumbing is owned and run by Daniel, a licensed Maryland master plumber with more than fifteen years in the trade. The company was built around a specific kind of work: the heavy, technical, high-stakes plumbing that keeps a home livable — water service mains, sewer mains, buried supply lines, water heaters, and pump systems. It is not glamorous work, and it is not the work a general handyman should be doing. It is the work ProStream does every week.

Baltimore is an unusual plumbing market. In Federal Hill, Fells Point and Canton, homes built in the 1800s still carry original galvanized supply lines and cast iron drains. In Brooklyn, Curtis Bay and Arbutus, mid-century bungalows sit on clay sewer laterals that have been shifting for seventy years. Out in Glen Burnie, Pasadena and Severna Park, post-war subdivisions are hitting the age where a water service line simply reaches the end of its life. Diagnosing those systems correctly requires having opened up hundreds of them.

What We Specialize In

Our core work is water main replacement, sewer main line replacement, and underground water and sewer line repair. Those jobs involve locating the line, confirming the failure point, coordinating permits and utility marks, excavating carefully around existing utilities, installing modern materials, and restoring the yard, walkway or driveway when the pipe is back in service. Alongside that, we handle water heater installation and replacement — tank and tankless — sump pump systems, water service repair, drain cleaning, water filtration, and crawl space and basement waterproofing.

How We Work

• Assessment before pricing. We look at the actual system, confirm the problem, and then quote it. No guessing over the phone.
• Written scope. You know what is being replaced, what materials are being used, and what restoration is included.
• Warranty-backed. Our repairs and replacements carry a warranty. If a job needs a second look, we come back.
• Licensed and insured. Maryland master plumber license #94824. Fully licensed, bonded and insured.
• Clean sites. Excavation is messy. We leave the property in the best shape the job allows.

Who We Serve

ProStream Plumbing works throughout Baltimore City, Baltimore County, Anne Arundel County and Howard County — homeowners, landlords, property managers and small commercial properties. If you are weighing a repair against a full replacement, call (443) 949-5878 and talk it through with a master plumber rather than a call center.