Slab leak determination Depending on your circumstances and because each situation varies, we may be able to perform the water test only or the sewer test only, but in some cases both tests are necessary. Determining if there is a fresh water leak below the slab foundation A water leak test is simple and quick. This is as effortless as inspecting your water meter for movement and can easily rule out a slab leak if there is no water moving. If there is water moving through the meter, our licensed plumbers must determine where the water is going Determining if there is a sewer water leak below the slab foundation A sewer leak test is more difficult to perform than a fresh water leak test. Main sewer line clean-outs must be present to properly test the sewer system. We will fill the entire system with water and use a test ball to plug the sewer system. Our licensed plumbers will observe the sewer system to see if the level of water drops. Depending on the level of drop, it will determine if there is a leak present or not. Fresh Water Leak Location or Sewer Leak isolation test Fresh Water Leak Location – If our licensed plumber determines that there is a fresh water leak under the slab, he will immediately cut off the water. Then, air is pumped into the water lines and a special listening device is used to detect air escaping to pinpoint the location of the leak on your water system. Sewer Leak isolation test – We will isolate the sewer leak(s) under the slab foundation by using different sized inflatable test balls and air hoses. We will test each section of the system with the test balls until the leak(s) is located. A camera may only show large separations in the pipe, but will not necessarily show a small crack. What may look like a leak on the camera may not actually be a leak, so using the camera to locate sewer leaks may not be as effective. Access and Repair of Fresh Water Leak or Sewer Water Leak There are two ways to access a leak under the concrete slab. One option is to jackhammer through the slab foundation and dig to the leak. Tunneling under the foundation from the outside is the other way to access a leak. This may be the best way to access and repair sewer water leaks due to the size and possible length of pipe that may be damaged.