FatSac Rear Locker Seat Ballast

Empty in-floor ski lockers often sit completely wasted during long surf sessions, but the versatile FatSac Rear Locker Seat Ballast transforms that open space into a pro-level wave-making asset. FatSac engineered this low-profile rectangular profile bladder to function as a multi-position solution that fits cleanly inside ski lockers or directly on rear bench seats. Adding 650 lbs of targeted water weight drives your boat hull deep into the water column, expanding the length of your wakesurf power pocket. Stance alignment remains stable. Every wave lip breaks with absolute clarity.

The rugged vinyl skin uses a proprietary, layered UV-stabilized polyvinyl chloride fabric engineered to tolerate heavy passenger foot traffic without dropping internal pressure. High-frequency welded and seam-taped joints eliminate traditional burst splitting along the edges, keeping your internal hull safe from high-volume leaks. Captains configuring automated drainage lines frequently match these high-flow inset valves with parts in our specialized boat wakeboard package sets inventory to secure fast pumping speeds. Four ports handle clean hose routing.

Low-Profile Multi-Zone Ballast & Rear Bench Balancing

This low-profile rectangular sac functions as an exceptional tuning tool for inboard boats that require dense weight without losing passenger seating space. Placing this 650 lbs bag flat across the rear bench pushes the transom down, shaping a steep surf curl.

We verified this 650 lbs rectangular sac performance inside a tight in-floor center ski locker. The four inset valve ports are highly effective, letting us route our fill lines along each end without any kinking or tight hose pinching under the deck plates. It held its pressure perfectly all day, adding serious mid-ship weight that smoothed out our wakeboarding wake.

Why Choose FatSac Rear Locker Seat Ballast

Standard cheap water bags expand into round, rolling logs that slide across the deck, bruising passenger ankles and splitting open during sharp turns. The FatSac Pro-X series bag prevents this safety hazard by packing low-profile rectangular stability and welded burst-proof layers together, providing a safe, high-value summer investment.

Factory Warranty & Professional Care Guidelines

This multi-position ballast sac comes backed by an official 1 Year Limited Manufacturer Warranty covering material and bonding defects. To keep the polyvinyl fabric flexible and protect the valve ports, rinse off lake muck after use. Store the bladder completely dry inside a dark locker.