FatSac W744 Check Valve and Adapter for Ballast Bags with Supa Pump

The FatSac W744 Check Valve and Adapter is an optional upgrade fitting designed for FatSac ballast bags, replacing the standard Quick Twist/Sac Thread Adapter. This two-part fitting installs directly onto your ballast bag and delivers the same quick-connect convenience as the stock adapter — with the added benefit of a built-in one-way check valve that prevents water from escaping the bag during pump connection and disconnection.

The integrated check valve is ideal for manually filling ballast bags using the FatSac Supa Pump, stopping backflow and keeping your boat's storage compartments and seating dry. An air inflation valve is also included, allowing you to inflate the bag using any standard air pump.

Key Features:

• Manual 1-way check valve prevents backflow when filling or draining
• Compatible with FatSac Supa Pump for manual ballast bag filling
• Replaces the standard FatSac Quick Twist / Sac Thread Adapter
• Integrated air inflation valve — works with any standard air pump
• Includes all O-rings needed for a secure, leak-free seal
• Includes bypass adapter fitting for easy water emptying
• Sold individually

UPC: 817177021529

WARNING: This product can expose you to chemicals including Diisononyl Phthalate (DINP), which is known to the State of California to cause cancer. For more information, visit P65Warnings.ca.gov.