plumbing washers

If you have any kind of filters or adapters on your faucets, especially in the kitchen, check the rubber washers once in a while. While replacing the filter unit on my kitchen sink, even though it hadn't been leaking, I discovered the old washer had completely disintegrated, leaving behind nothing but black goo. That's not something I want in my drinking water.

In the past, I've encoutered washers partially disintegrated, but I've never seen one completely gone to goo, like this one was.