Tube Fat Sac Ballast Bag - 370lbs - Black

FATSAC Tube Fat Sac Ballast Bag - 370lbs - Black

The FATSAC Tube Fat Sac is one of the most popular ballast bags in the Pro-X Series, trusted by world-class athletes and top boat manufacturers including Nautique, Moomba/Supra, and Malibu/Axis. Designed with a long and narrow 62" x 16" x 10" profile, it adds 370 lbs of ballast and fits perfectly in a wide range of locations throughout your ski or wakeboard boat — from the ski locker to the bow walkway, under seats, and in storage compartments.

Whether you need additional weight up front for wakeboarding or extra ballast amidships for surfing, the Tube Sac delivers consistent, reliable performance. Its versatile shape means it can serve as a portable or integrated ballast solution, making it one of the most flexible options available for wake enhancement.

Each FATSAC ballast bag is handmade in the USA using a proprietary layered vinyl material specifically engineered for ballast applications. Seams are welded and then taped for industry-leading strength and durability. The material is UV stabilized to withstand prolonged sun exposure. All fittings are manufactured in-house, allowing for fully customized setups. The bag includes all fittings required for use with the Supa Tsunami Pump (sold separately), and custom printing is also available.

The bag features 3/4" ports — 2 fill/vent ports and 1 drain port — designed for fast fill and drain times when paired with the Fly High FATSAC Supa Tsunami Pump. Fittings included are compatible as a portable ballast system and also have integration compatibility for permanent installations.

Key Features

• 370 lb ballast capacity
• Dimensions: 62" x 16" x 10"
• 4 port holes; 2 fill/vent, 1 drain; 3/4" port size
• Proprietary UV-stabilized layered vinyl material
• Welded and taped seams for maximum durability
• Handmade in USA
• Includes fittings: 2 x W731, 1 x W749, 1 x W730
• Compatible with Supa Tsunami Pump (W709-SUPA, sold separately)
• Fits ski lockers, bow walkways, under seats, and storage compartments
• Custom printing available (fees apply)
• 1-year warranty
• California Proposition 65 Warning: This product can expose you to chemicals including Diisononyl Phthalate (DINP) and Diisodecyl Phthalate (DIDP) which are known to the State of California to cause cancer. For more information go to P65Warnings.ca.gov.