Lanham is an unincorporated, built-out stretch of Prince George's County along the Capital Beltway, where WSSC Water supplies water and sewer and issues every plumbing and gasfitting permit, and DPIE issues building permits. Office, medical and retail buildings mixed with older neighborhoods keep commercial plumbers busy. Call the number on this page to be connected with a local plumber in Lanham.

Local conditions in Lanham
Lanham sits along the Beltway next to the New Carrollton Metro and Amtrak station, with office and commercial employers, Doctors Community Hospital and residential neighborhoods such as Seabrook. The Lanham mailing name stretches beyond the community itself, but it is all unincorporated county. The median home dates to 1969, and many nearby commercial buildings are from the same era, so original cast iron drains, copper supply and older water heater rooms are common.
Prince George's County's DPIE issues no plumbing permits. WSSC issues and inspects them, with a satellite office inside DPIE (Permit Services 301-206-4003), and water heater replacements and testable backflow devices need a permit. WSSC also requires a professional holding its license for service line repairs, repiping and all gas work. Backflow assemblies on fire sprinkler lines, chemically treated boilers and irrigation have to be tested every year, and after installation, repair or relocation, by a journeyman or master plumber with a WSSC license who is a certified cross-connection technician. The county cross-connection line is 301-206-8601.
WSSC owns the water service line from the main to the property line, and the owner is responsible from there into the building. Washington Gas serves the county, though BGE serves some areas, so confirm on the bill. If anyone smells gas, get out, then call 911 and Washington Gas at 844-WASHGAS (927-4427), option 1, from a safe place.
Repair or replace?
| System | Often repaired | Often replaced |
|---|---|---|
| Cast iron building drain | Cleared and spot-repaired at a crack or joint | Section lined or replaced after repeated backups |
| Water heater | Controls, valves or elements on a younger unit | Leaking tank or capacity too small for current use |
| Restroom fixtures | Flush valve rebuilds, sensor or cartridge fixes | Cracked fixtures or accessibility upgrades |
| Backflow assembly | Rebuild kit and retest | Damaged body or wrong type for the hazard |
Signs to watch
- Recurring clogs in ground-floor restrooms
- Water stains spreading on ceiling tiles
- Rust-colored water after a shutdown
- A boiler or heater room floor that's always damp
- A backflow device leaking from its relief valve
Timing notes
Schedule shutdowns for drain work and water heater swaps around office hours or weekend closures. Before winter, check that backflow assemblies and pipes in unheated stairwells, loading docks and garages are insulated.
Commercial Plumbing questions in Lanham
Which office issues plumbing permits for a business at this address?
Does a boiler or fire sprinkler line need backflow protection?
In a leased space, who usually pays for plumbing repairs?
Does water hardness matter for commercial water heaters and kitchen equipment?
More plumbing services in Lanham
Commercial Plumbing nearby
Helpful guides
Sources
- WSSC Water: about us
- WSSC Water annual water quality report
- WSSC Water: cross-connection control and backflow
- Prince George's County DPIE: residential plumbing permits
- WSSC Water: service lines
- WSSC Water Permit Services: information for homeowners
- Washington Gas: service territory
- Washington Gas: natural gas safety
- Lanham housing by year built
- Lanham, Maryland (Wikipedia)
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