Whether you’re looking for emergency plumbing repair work, commercial or residential water treatment service, or plumbing for new construction or remodeling, we will get the job done quickly, efficiently, and correctly. Alexander Plumbing Services, Inc. is owned and operated by Mark Alexander, a master plumber and gas fitter with 30+ years of experience. We have a professional staff who will take care of all of your plumbing needs for a fair price. We service residents and businesses in Harford, Baltimore, and Cecil Counties.