 a sewer line, like a drain line. Right. And you know that. I think you've seen that, right? Oh, many, many times. And it doesn't do anything bad initially because it's a screw. And it's just, it's kind of like a, I mean, think about it. The cap on your plumbing system is a threaded device, right? And it keeps the water from moving. But over a period of time, corrosion, what have you,