Baltimore City · Baltimore–Columbia–Towson metro
Plumbing help in Baltimore, MD
Older PipesFrozen Pipes
Baltimore's rowhouse neighborhoods hold some of the oldest housing of any big US city: the median home dates to the 1940s. That brings old galvanized supply lines, cast iron drains and aging sewer laterals into many repairs, and freeze-thaw winters add burst pipes to the list.
- Median home built
- 1947
- Built before 1980
- 82%
- Owner-occupied
- 48%
- Water hardness
- See below
- Winter
- Regular hard freezes
- Plumbing code
- State code
Common repairs in Baltimore homes
- Sewer Line Repair
Old clay and cast iron laterals under rowhouses crack, sag and let roots in.
- Repiping
Galvanized supply pipe in pre-war rowhouses corrodes, causing low pressure and rusty water.
- Frozen Pipe Repair
Pipes along exterior rowhouse walls and in rear additions freeze in cold snaps.
What's behind the walls of Baltimore's older homes
The median home in Baltimore was built in 1947, and 82% of homes predate 1980. Homes from that era were typically built with galvanized steel supply lines, cast iron drains and clay sewer laterals, often partly replaced over the years.
- Galvanized steel supply (1900–1960)
- Copper supply (1950–2000)
- Polybutylene (some homes) (1978–1996)
- PEX / CPVC (1995–today)
Emergency plumbing in Baltimore
Call (833) 878-1592Shut off your main water supply if it's safe to do so. The emergencies below are listed most likely first for Baltimore homes, based on local conditions.
Frozen pipe risk in Baltimore
Regular hard freezes · 82% of Baltimore homes were built before 1980
Which plumbing rules apply in Baltimore
Plumbing and gas work in Baltimore must be done by plumbers licensed by the Maryland State Board of Plumbing, which licenses apprentice, journey and master plumbers and gas fitters statewide. [1]
Plumbing services for Baltimore homes
Baltimore plumbing questions
How do I check a plumber's license in Baltimore?
Plumbers and gas fitters are licensed by the Maryland State Board of Plumbing; verify the license with the Maryland Department of Labor before work starts.
What should I check before buying an older Baltimore rowhouse?
Ask for a sewer camera inspection of the lateral, check whether supply lines are galvanized, and look at the water heater's age and venting. With the median home from the 1940s, original pipe is common.
Why do Baltimore rowhouses have so many sewer problems?
Many laterals are original clay or cast iron from the early to mid-1900s. They crack, sag and let roots in, and a camera inspection shows which repair fits. See sewer camera inspection.
Sources (2)
- U.S. Census Bureau, ACS 2024 1-year (B25035) · checked 2026-10-01
- Maryland Department of Labor, Board of Plumbing License Requirements · checked 2026-10-01