10/03/2021
ASTAR highly recommends getting a hydrostatic test for your new or existing home purchase they normally run about $100.
EVERYTHING YOU NEED TO KNOW ABOUT HYDROSTATIC PRESSURE TESTING
Pipes don’t last forever. While they are made from materials that can last for several decades, in time, joints can come apart. The weight of the soil and the building above can cause buried pipes to crack and start leaking. Tree roots can infiltrate and damage the pipes. The problem is, when a leak is deep underground, you may not know you have one for a long time.
Hydrostatic testing is actually a drain leak test since no pressure is used.
How Does Hydrostatic Testing Work in a Home’s Sewer System
Trees are always searching for reliable sources of water. They send their roots in every direction to find moisture. Sewer pipes are an attractive source. The tree sends microscopic root tendrils into the tiniest opening. If it finds a place to get inside, the root will start drawing moisture from that source. This triggers the root to grow bigger, which forces the opening to become larger. In time, the roots can crack the pipe and cause it to break.
Hydrostatic testing helps plumbers find these hidden leaks. It starts by finding the drain line’s cleanout. The plumber inserts an inflatable test ball into the cleanout. The ball gets inflated to block the sewer line, usually close to the foundation’s edge.
With the main sewer line blocked, the plumber fills it with water, up to the slab’s top edge. Then, it’s a matter of waiting. The plumber waits to see if the water level starts to drop. If it does, there’s a leak under the building’s slab.
The next step is to find out where the leak is called an isolation test. One option is to feed a video camera down into the sub-slab pipes to find the location of the leak. It also offers the ability to inspect the general condition of those pipes.
Another option is to use inflatable plugs to isolate and test different sections of pipe. The plumber uses the video camera to position the plugs to different points. This makes it possible to isolate and test different sections of the pipe.
Why Use Hydrostatic Testing
Hydrostatic testing is performed to determine if a house or building a sub-slab sewer system contains leaking piping. Test plugs are inserted into existing cleanouts to block and fill the 50+-year-old cast iron sewer system with water. The water is observed in an exposed toilet drain – a loss in water level indicates leaks in the aged piping.