The best in commercial and industrial plumbing/pipefitting services

Licenses and Services
MD State Journeyman Licensed Plumbers
Medical Gas Certification
Backflow Prevention Certification
Certified Welders
MD State Master Plumber License #7401
Maryland State HVAC License #5531
Steam and hot water boiler installation
Design and build plumbing systems
Perform pipe and duct work insulation
Complete refrigeration installation service
MD State licensed sprinkler contractor











While the art of plumbing hasn't changed significantly since R.H. Lapp first went door-to-door in 1929, our ability to handle industrial and commercial jobs has.

We provide commercial and industrial plumbing services, with many jobs we design and install requiring as many as 250 plumbing fixtures. Our average plumbing job exceeds 100 plumbing fixtures installed.

That average translates to jobs of considerable size, such as schools, hospitals and industrial centers. R.H. Lapp & Sons, Inc. can handle a plumbing job of almost any size, both because the company taps its 70 years experience in the field and hires only the best Maryland state registered journeyman plumbers in the business.

All R.H. Lapp & Sons plumbers and pipefitters complete an intense five year apprenticeship training program operated through Plumbers and Pipefitters Local 489.

Our plumbing employees average 8 to 10 years with the company, with some having been with R.H. Lapp & Sons for over 25 years. That’s invaluable experience put to work for each client served, experience many other mechanical contractors find hard to match.