Ever drilled into a wall without thinking? One simple mistake could cost you over $150,000. Let me share a story that underscores the importance of knowing what’s behind your walls before you drill. Welcome back to the Multifamily Collective! Today, I want to dive into an experience that serves as a stark reminder of why it's critical to always "know before you drill." We've all seen the signs to call 811 before digging, but what about drilling into walls? Let me tell you about a time when a seemingly small mistake turned into a massive $150,000 disaster. A new technician at a property I managed drilled three perfect holes through a 3/8 inch copper water line, flooding 28 units in the process. The damage was extensive, and the lesson was clear: never assume you know what's behind the wall. This incident, alongside another involving a damaged gas line due to a contractor skipping the necessary safety checks, highlights why it’s essential to check before you drill. From avoiding electrical hazards and preventing water damage to ensuring structural integrity, knowing what’s behind your walls is not just a best practice—it’s a must. Always use tools like stud finders, educate your team on where shutoff valves are, and regularly review safety protocols. And if you're a homeowner, make sure everyone in your house knows where the shutoff valves are, just in case. If you found this story helpful, make sure to like the video, subscribe to the channel, and hit that notification bell. Let’s keep our communities safe, one careful drill at a time!