The R&D crew at Ocean and Necky have invented a venturi scupper plug! It drains off any water collected in the kayak as you move. Absolutely ingenious. It won't drain water as you sit still, but any time you get water on the deck, just start paddling and you will start to see it work. The plug fits all Necky SOT's and about 75% of the Ocean SOT's. This is different from the regular scupper plug in that it is designed to drain water from the boat as you are moving through the water.