The vent opening on your roof is susceptible to bird nests, dead leaves, or even small rodents looking for warmth.

For deeper clogs, you’ll need a heavy-duty motorized auger. These are fed through a "cleanout" plug (usually found in the basement or outside the house). The metal cable spins and chops through roots and debris. 3. Hydro-Jetting

Avoid using harsh store-bought chemicals in a main stack. They are rarely effective on large-scale blockages and can corrode older metal pipes or trap heat that damages PVC. Preventing Future Blockages

The stack pipe (or soil stack) is the central nervous system of your home’s plumbing. When it fails, the entire system can grind to a halt. Here is everything you need to know about identifying, fixing, and preventing a stack pipe blockage. What Exactly is a Stack Pipe?

This is the "gold standard" for stack cleaning. A technician uses a high-pressure water jet to scour the inside of the pipes. It doesn’t just poke a hole in the clog; it removes grease and scale, restoring the pipe to its original diameter. 4. Chemical Solvents (Last Resort)

When the vent portion of the stack is blocked, sewer gases have nowhere to go but back into your living spaces.