Alfakennyone presented this puzzle a couple of days ago. Let's assume a steady rate of flow (inlet does not exceeed outlet), and no confounding factors such as air pockets or rust. Look carefully before you decide. Then check out the answer and explanation.
Then you'll want to see the animated version, showing the containers being filled with water, made by CorneliaXaos, who dedicated more than three hours to making it happen. Spoiler: eventually, your basement will be completely flooded. (via Boing Boing)