Did you turn on your (frost free) outside faucet and water starting leaking inside your house? Here's the top 5 reasons that is happening:

1. A hose was left on the faucet during freezing weather and split the faucet.

2. The faucet is split because you forgot to remove a hose before freezing weather

3. It was installed without correct pitch

4. It doesn't extend into an adequately heat space

5. But really, I bet someone left a hose attached to it

Remove all hoses and adapters from outside faucets before any freezing weather.

Bonus tip:

Save yourself some headaches by not leaving aluminum hose connectors attached to faucets for extended periods of time. I don't know why, but those aluminum to brass connections seize up and need to be cut off with a hacksaw.