The FatSac 3/4″ Quick Connect with Suction Stop Sac Valve Threads (often listed as Part W736‑SS) is a marine ballast fitting used in FatSac ballast bag systems to create a secure and airtight connection between the ballast bag's sac valve and compatible quick‑connect hoses or fittings. It features a male 3/4″ quick‑connect end that mates with common Flow‑Rite quick‑connects found on ballast hoses, and “suction stop” technology built into the sac valve threads helps prevent unwanted backflow or the bag being sucked flat during pump‑out operations by reducing suction issues. Dual O‑rings provide a superior seal for reliable performance in automatic ballast and other marine systems where airtight connections are essential.