Review on Weatherproof Extension Cord Connection Box by Stuart Sugden

Other reviews here are correct. If you are using heavier cords like those supplied with pumps, it is almost impossible to thread them into the grooves and then close the retaining clip. In addition, the connector must be very compact. I tried two before finding a third that was short enough to fit. After doing everything but stepping on the retaining clip to close it, it still wasn't fully sealed. We'll see what happens, but I'm disappointed.