Water in the wrong place, and water that will not reach the right one.
A rain barrel that needs emptying before the next storm. A pool cover holding half a bath of green water. A window well that fills every spring. A transfer pump screws onto an ordinary garden hose and moves that water somewhere sensible in minutes rather than in trips with a bucket.
And at the other end of the same hose — a nozzle that goes from a jet hard enough to strip road salt out of a wheel arch to a fan soft enough not to flatten seedlings, without walking back to the tap to change anything.
One honest limit, stated plainly on both pages: a transfer pump is not a sump pump, and a hose nozzle is not a pressure washer. If your basement is actively filling, you need a submersible sump pump wired in, and we would rather tell you that than sell you the wrong thing.
