This little gasket is a specific replacement part for InSinkErator garbage disposals.

It's the mounting gasket that goes between the sink flange and the disposal unit itself – the one that keeps water from leaking down the sides when you're running the faucet.

Over time, that rubber can crack, harden, or just stop sealing properly, and that's when you start noticing drips under the sink.

The part number is 11227, and it's designed to fit a bunch of InSinkErator models.

It's a simple ring of sturdy rubber, but it does a critical job.

If your disposal is leaking from the top where it meets the sink, this is likely the culprit.

Swapping it out is a messy but straightforward job – you'll need to disconnect the disposal and replace the old gasket with this one.

It's not a glamorous part, but it's the kind of thing you don't think about until you need it.

Keep one around if you've got an InSinkErator, or grab it for a repair.

Cheap insurance against a water-damaged cabinet floor.