A slab leak in Riverdale is a water pipe leaking under concrete, most often a basement floor in the older houses or a slab under newer townhouses. WSSC Water supplies the area, and the pipe inside your home and under its floor belongs to the owner. Call the number on this page to be connected with a local plumber in Riverdale.

Possible signs
- The meter's leak indicator moves with all water off
- A floor spot near the water heater, kitchen or bath feels warm
- A damp basement floor that does not dry between storms
- Pressure loss you cannot trace to a single fixture
- Hissing under the floor when the house is silent
About Riverdale
Riverdale is a mailing name that covers the incorporated Town of Riverdale Park, a former streetcar suburb along US 1 just south of College Park, and nearby unincorporated areas such as Riverdale Heights. The median home in Riverdale Park dates to about 1957. Many of these houses have basements, galvanized or early copper supply pipe, and a service line that may cross under part of the basement floor.
WSSC Water says part of each service line is utility-owned and part is customer-owned, and it asks customers replacing their portion to notify it first. Its What's Your Pipe Type? program inventories service line materials and helps customers replace lead lines on either portion. WSSC's tap water analysis lists average hardness around 140 mg/L from its Potomac plant and about 64 mg/L from its Patuxent plant. For water surfacing near the street, call WSSC's emergency line at 301-206-4002.
What affects the price
- Pinpointing. Isolating each branch, then using listening or thermal equipment to mark the spot.
- Access. Opening a small section of slab, or rerouting through an unfinished basement ceiling.
- Pipe condition. Worn galvanized pipe may justify replacing a whole run rather than one section.
- Floor restoration. Tile and finished lower levels take more work to put back.
- Permits. WSSC Water issues plumbing permits; building permits are a Prince George's County matter, and Riverdale Park residents should also check with the town about any local step.
When you call
You will be connected with an independent plumber serving Riverdale. Say whether you live in the Town of Riverdale Park or an unincorporated area, how old the house is, and what you saw during your meter check. If water is spreading, close the main shutoff, usually on the basement wall where the service enters, and keep it closed until the plumber arrives.
Slab Leak Repair questions in Riverdale
Does the local water wear out copper pipe under the floor?
Does slab leak work need a permit, and who issues it?
How can I tell whether the leak is under the house or out in the yard?
Why does one patch of floor feel warm?
More plumbing services in Riverdale
Slab Leak Repair nearby
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