There are different techniques a plumber can use to identify where the slab leak is. This is very important, as the plumbing leak can be located in your drain line (which removes waste water away from your home) or your main supply line (which brings water into your home).
To detect a damaged supply line, the plumber would use a hydrostatic test and examine the pressure levels. If it is a problem at the supply line, it may be difficult to repair the line without a specialist. Special equipment is needed to detect a leak in your drain line. We are experienced with both!
Water leak detection often requires special equipment. However basic tests can initially confirm the presence of a general plumbing leak inside the home.
A basic slab leak test can be done with a pressure gauge. Install a pressure gauge on your plumbing system, and then turn off your water. If the pressure gauge reads a static water pressure right when you turn the water off and then 15 minutes later. If the second pressure reading is lower than the first, then there is a leak.
This does not mean the leak is located inside your slab. Check toilets, faucets, and under sinks. If you can’t locate the source of the leak, you’ll need a professional to further investigate.