Tree roots naturally grow toward sources of moisture, and older sewer pipes can attract them when small cracks or loose joints allow water to escape. Once roots enter a pipe, they gradually spread and trap toilet paper, grease, and other waste. Over time, this buildup can restrict water flow or completely block the sewer line. Homes surrounded by mature trees may be particularly vulnerable, especially when their underground plumbing has deteriorated with age.
One popular online remedy suggests pouring approximately one cup of rock salt into the toilet and flushing it down the drain. The idea is that salt may dry out or discourage roots growing inside the pipes. However, this method is not a dependable solution for an established blockage. Even if salt affects some roots, it cannot repair the cracks that allowed them to enter. Repeatedly flushing large amounts of salt may also damage surrounding soil and vegetation if salty wastewater escapes from the sewer system.
The safest approach is to contact a qualified plumber when drainage problems continue. Professionals can use specialized sewer cameras to inspect underground pipes, locate obstructions, and determine whether roots or structural damage are responsible. Depending on the severity, they may remove the roots using specialized equipment or repair damaged sections of pipe. Addressing the underlying problem early can prevent sewage backups, expensive repairs, and further damage. While the salt trick may sound convenient, a proper inspection and lasting repair are far more reliable than an unproven household shortcut.
