GROCO 2-1/2" Safety Seacock w/2" Side Port

The GROCO 2-1/2" Safety Seacock w/2" Side Port is a marine through-hull fitting engineered for serious cruisers, commercial operators, and boaters who demand reliability below the waterline. This seacock serves as the critical control point for raw water intake systems, engine cooling circuits, and auxiliary through-hull connections where failure is not an option. Built to GROCO's exacting standards, it provides the redundancy and accessibility that experienced mariners expect when managing vital hull penetrations in salt or freshwater environments.

This 2-1/2" seacock features dual driver ports that permit flexible handle relocation, allowing you to orient the shut-off lever to match cockpit layout or accessibility constraints—a practical refinement on smaller boats where space around through-hulls is tight. The integrated 2" NPT threaded side port accepts standard SSCV (stainless steel check valves) or any NPT-compatible accessory, enabling modular plumbing configurations without additional fittings. The handle incorporates a square hole that accepts a standard ratchet, granting leverage and control even in confined bilge spaces where hand strength alone may prove insufficient in an emergency shutdown scenario.

Cruisers running twin engines, complex cooling loops, or redundant raw-water systems will find this seacock indispensable for isolation and maintenance. The NPT side port accommodates aftermarket check valves, strainers, or isolation blocks, making it a cornerstone fitting in modular through-hull systems. Installation requires a 2-1/2" marine through-hull core and compatible hose barbs; consult your vessel's plumbing schematic to confirm compatibility with existing sea-chest or hull penetration infrastructure. This is a professional-grade component built to endure decades of saltwater exposure—exactly the kind of fitting that pays dividends during a crisis or routine engine service far from port.