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SLAB LEAK DETECTION

Find the leak before you break the concrete.

A leak beneath a concrete slab can be difficult to locate because there may be no visible sign of where the problem actually began. Left undetected, slab leaks can lead to higher water bills, damaged flooring, persistent moisture and potentially more serious property damage.


Mainline Leak Detection uses non-invasive diagnostic technology to pinpoint leaks beneath concrete foundations in residential, commercial and governmental properties—helping eliminate unnecessary demolition and giving your repair professional a targeted location to work from.


Common Signs of a Slab Leak


  • Unexplained increases in water bills
  • Warm or damp areas on floors
  • The sound of running water when fixtures are off
  • Cracking, buckling or changes in flooring
  • Persistent moisture or musty odors
  • Unexplained hot spots on slab foundations


How We Locate Slab Leaks


Our technicians use advanced acoustic listening equipment, pressure testing and thermal imaging when appropriate to detect and locate leaks beneath concrete.


By combining diagnostic methods, we can narrow down the source of the leak before the concrete is opened, allowing repairs to be planned more efficiently with less disruption, less demolition and less guesswork.

Cutaway image of technician using sophisticated listening device to identify location of leak under
Approximate location of cold waterline beneath the slab
Suspected leak location under shower slab
Leak detected under slab
Leak detected under slab floor
Suspected leak area beneath slab of laundry room
Leak identified below slab
Leak below slab causes damage if not caught early
Precise leak location beneath a slab
Water leak detected on brick wall slab.

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Serving South Central Pennsylvania, including York County, Lancaster County, Adams County, Dauphin County, Cumberland County, Chester County and surrounding areas.

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