How to repair slab leak?

Find the location of the slab leak. If this is a hot water slab leak, walking about with bare feet will likely guide you correctly to the location. Because the leak is below the slab, your feet won't get burned-out but will just feel lukewarm if you come upon the slab leak. Sign the location with masking paper.

Loose the slab from the location. Attempt to take away as little slab as possible to avoid comprehensive impairment and slab replacement.

Utilizing the concrete drill bit, start out to drill through and through the slab. Because the slab is approximately 4 inches thick, it may take awhile. Create an opening large enough to let your hand to fit so you may grasp down to find the slab leak. Once it have find the slab leak, make the opening greater to fix the pipework.

Close the water flow at the main pipe and utilizing a pipe cutter, chop off the pipe that's leaking out. Substitute the model of pipework you took out with an same piece, whether copper or polyvinyl chloride (PVC). If PVC pipe, cut off a new part of similar length and change it as you'd in other PVC pipe fixing. If the pipe is copper, you'll have to weld the pipe into place. Leave the hole exposed for a day to ensure that the slab leak is adequately closed.

Mix a bagful of concrete and fill up the opening to the top, sealing them with adjacent flooring. Leave to dry out and cured to some days.

If cured, employ construction adhesive material to fasten a fresh piece of slab in place.