Quality plumbing you can count on

Knowledgeable professionals

As a licensed full-service mechanical contractor, our company consists of experienced master, journeyman and apprentice plumbers to install, retrofit, replace, upgrade and modify plumbing systems in new and occupied buildings. With every plumbing project, our team aims to ensure minimal impact on building occupants’ productivity. RM Thornton has an outstanding reputation in the Washington metro area for the quality of work and the customer service our team provides to all of our clients.

Steam Piping
RM Thornton’s certified welders have performed numerous steam piping projects, spanning from simple installations to complex multi-stage projects, both underground and above ground. With every steam piping installation we perform stress analysis in addition to certification of the hanger/anchor layouts. Some of the facilities where we have performed steam piping jobs include: Naval Research Lab, NIH and Catholic University.

Fire Sprinkler/Repair
As part of its HVAC Maintenance Agreements, RM Thornton’s expert team can install systems and provide the yearly maintenance and testing required by many insurance companies and municipalities. For more than 30 years RM Thornton has been a trusted resource in the Washington metro area for installing, retrofitting, repairing and servicing fire protection systems for many organizations such as: Verizon, Pepco, Gosnell Properties, Macy’s and NBC TV.