GROCO 1/4" NPT #316 Stainless Steel In-Line Ball Valve

The GROCO 1/4" NPT #316 Stainless Steel In-Line Ball Valve (model IBV-250-S) is a marine-grade isolation valve engineered for demanding fluid systems where corrosion resistance and reliable shutoff are non-negotiable. Built from #316 stainless steel, this valve delivers superior performance in saltwater and chemically aggressive environments where standard carbon steel fails. Rated to 1000 WOG (working operating gauge pressure), it handles both freshwater and saltwater applications with the durability required for offshore, coastal, and high-performance marine engine installations.

The 1/4" NPT threaded connection accommodates standard marine plumbing and fuel system configurations. A thumb-release locking mechanism holds the valve in its selected position, preventing unintended opening or closing from vibration or accidental contact—critical in rough-water operation or engine compartments subject to shock loads. The ratchet-compatible square handle allows operation of hard-to-reach valves without hand strain, and the design accommodates standard ratchet tools for precise, controlled actuation. For larger valve installations (1-1/4" and up), the integrated grease zerk fitting enables lubrication and drainage without system disassembly.

This valve is specified in marine fuel systems, bilge pump circuits, and cooling water lines where isolation and flow control must survive salt spray, thermal cycling, and constant moisture exposure. The #316 stainless steel construction resists both chloride corrosion and galvanic attack, eliminating the maintenance burden and safety risk of corroded shutoff valves in critical systems. Compact at 3 x 2 x 6 inches and weighing 0.6 lbs, it fits easily into confined engine compartments and plumbing runs. Serious marine builders and offshore equipment technicians choose GROCO valves when standard bronze or carbon steel components would fail prematurely in harsh saltwater service.