You keep your house spotless. You take out the trash daily. Yet, you keep finding massive, reddish-brown cockroaches in your bathroom or laundry room.
You aren’t dealing with a hygiene problem. You are likely dealing with a plumbing breach.
According to Texas A&M AgriLife Extension, the American Cockroach (often called the “water bug” in Texas) prefers dark, moist environments—specifically, sewer lines. They live comfortably inside the city sewer mains.
The “Sewer Highway” Into Your Home
Under normal circumstances, these bugs stay in the pipes. Your plumbing system is designed to be a closed loop. The water in your P-traps (the U-shaped pipe under the sink) acts as a seal that bugs and gas cannot pass through.
So, if they are walking across your bathroom floor, it usually means one of two things:
- A Dried P-Trap: If you have a guest shower you rarely use, the water barrier may have evaporated. (Run the water for 30 seconds to fix this!)
- A “Dry” Pipe Break: This is the more serious issue. In older San Antonio homes with cast iron pipes, the top of the pipe often rusts out (a condition called “Crown Rot”).
Because the break is at the top of the pipe, water doesn’t leak out, but bugs can crawl out. Your sewer line has effectively become a highway for pests to enter your walls and vanity cabinets.
Stop the Bugs at the Source
No amount of bug spray will fix this because the entry point is still open. You need to seal the breach.
We use Drain Camera Inspections to locate the exact spot where the pipe has cracked or collapsed. Once found, we can seal it permanently using Epoxy Lining, cutting off their entry point forever.
Ready to Evict the Pests?
If you are tired of sharing your bathroom with uninvited guests, it’s time to check your pipes.
- Suspect a break? Call Us at (210) 529-8848 or visit our contact page.