SUMO is the fastest filling ballast system in the industry! Equipping your boat with SUMO means less time filling and more time riding your massive wake! All SUMO ballast is easy to use, durable and convenient. Sumo ballast is designed to work as a plug 'n play option with your factory ballast system or on deck with our high speed SUMO pumps. The Sumo Max 575 Ballast Bag and Sumo Max Flow Pump Combo makes for an easy way to upgrade your ballast. The Sumo Max Ballast Bags are durable bags designed for use with the Sumo Max Flow Pump, and offer the option of integrating into your built-in ballast system. With the fastest portable pump on the market, you'll be enjoying your new, larger wake in no time!