Rear engine compartments often have empty, wasted space that could be used to build a bigger wake, making the FatSac 750# Ballast Bag – Gray a crucial upgrade for your inboard boat setup. FatSac specifically shaped this multi-zone marine bladder to contour perfectly inside rear locker compartments, down center walkways, or across open bow floors. Packing an additional 750 lbs of water weight drives the transom deep into the water column, throwing out a massive, clean surf curl. The high-displacement hull placement ensures unyielding edge hold during wakeboard launches. Waves grow taller. The lip breaks cleanly.

This industrial ballast skin uses a proprietary, layered UV-stabilized polyvinyl chloride fabric finished in a sun-resistant gray coating that shrugs off fuel fumes. Four inset valve ports are high-frequency welded and pressure taped by hand to prevent structural seam ruptures under heavy regular wave slaps. Captains configuring automated drainage lines frequently match these high-flow ports with parts from our boat wakeboard package sets inventory to secure fast pumping speeds. An extra bottom drain port speeds up packing.

Key Features of FatSac 750# Ballast Bag – Gray

- 750 lbs Displaced Weight: Displaces approximately 90 US gallons of water to maximize rear-end transom depth and lengthen your surf zone.
- Proprietary Gray Polyvinyl Fabric: Formulates a tough, marine-grade protective skin that resists heavy sun degradation, scuffs, and chemical engine fumes.
- Burst-Proof Seam Construction: Utilizes high-frequency industrial welding and pressure seam-taping to eliminate splitting failures under high volume loads.
- Multi-Zone Silhouette Form: Measures 50 x 20 x 20 inches to fit snugly inside standard V-drive rear lockers or open bow walkways.
- 4-Port Inset Valve Layout: Outfits the body with four separate inset valve locations to allow flexible, clean hose routing from any angle.
- Extra Bottom Drain Port: Imbeds a low-profile bottom drain valve to ensure complete water evacuation and fast out-of-the-water packing.
- Turnkey Fitting Kit Included: Packs essential high-flow fittings including two W731, one W749, and one W730 quick-twist connectors out of the box.
- Supa Pump Compatibility: Pairs seamlessly with Supa Pump 3.0 and standard 1-inch Tsunami ballast pumping systems for rapid fill cycles.

Multi-Zone Ballast Placement & Pro-Level Wave Shaping

This 750 lbs gray bag serves as the industry standard for creating deep, competition-ready wave pockets behind inboard wake boats. Placing a bag in each rear locker forces the transom down, generating a steep wave face that lets surfers drop the rope safely.

Our team integrated this 750 lbs gray sac into a tight rear engine locker compartment. The four-port layout is an awesome asset; it let us run our fill and vent hoses cleanly without any kinking or line pinching. The bottom drain evacuated every drop of water, making the bag light and simple to roll up.

Why Choose FatSac 750# Ballast Bag – Gray

Cheap, thin water bladders melt or rot when exposed to hot engine bay temperatures and raw fuel fumes, causing massive interior leaks that can short out bilge pumps. The FatSac Gray bag prevents this expensive damage by wrapping your ballast inside a chemical-resistant, heavy-duty vinyl shell, protecting your boat plumbing budget.

Factory Warranty & Professional Care Guidelines

FatSac backs this Pro-X series ballast sac with an official 1 Year Limited Manufacturer Warranty covering material and seam defects. To ensure optimal performance from the welded valve ports, hand-tighten all quick-twist fittings before launching the boat. Dry the gray vinyl completely before long-term winter storage.