We are the licensed experts you can count on! In business for more than 20 years, Haynes Plumbing is the most trusted and long established plumbing company serving Maryland, Washington DC, and Virginia. As a fully licensed and insured service plumbing company, we cover the commercial and residential needs of clients in the areas we serve. Our entire team of experienced plumbers is committed to outstanding, efficient and professional customer service for all sectors of the community. Whether you have a leak or need new plumbing fixtures installed, let Haynes Plumbing assist you today! We get any plumbing or sewer job done promptly and correctly—the first time around too!