What does ''running afoul'' mean?

In literature, it usually refers to blood in the water, perhaps from a fight or war. In real life, you've probably got copper or iron in your water system. It could also mean that your water is...

A covenant runs with the land when the rights or liabilities of the covenant pass to the succeeding owners with the title to the land.

It means what it looks like - you are almost out of time. Your deadline is rapidly approaching.

That you like her? That its a girl you want to be with, and don't want to lose? Those sound like the most logical answers to me

If you mean the toilet tank, it means you have a leak and water (and $$$ if you have a water meter) are being lost. It is the same as a leaky faucet. You need to find the source of the leak and...