GROCO Bronze Clam Shell Style Hull Strainer f/Up To 1" Thru Hull

The GROCO Bronze Clam Shell Style Hull Strainer for up to 1" through-hull is a marine intake protection system built to prevent debris, marine growth, and sediment from entering raw water cooling lines aboard fishing vessels, cruising boats, and commercial watercraft. Constructed from C84400 bronze—a marine-grade alloy proven in saltwater environments—this strainer combines durability with reliable intake filtration over years of service in demanding conditions.

The clam shell design houses cast filter slots that intercept suspended particles before water reaches the engine block, transmission cooler, or air conditioning system. Pressure relief holes integrated into the door casting protect the strainer basket from rupture during high-flow conditions or partial blockage—a critical safety feature that prevents catastrophic cooling system failure. The hinged door design allows quick access for seasonal cleaning or inspection without removing hull fittings, a practical advantage during haul-out maintenance or end-of-season commissioning. Maximum through-hull diameter compatibility is 1 inch, making this strainer suitable for displacement hulls, cruising trawlers, and mid-range fishing platforms with standard cooling intake configurations.

This strainer suits boat owners and technicians seeking proven, field-tested intake protection without mounting ring modification—the strainer bolts directly to your existing 1" through-hull fitting. Bronze construction resists galvanic corrosion and erosion from prolonged saltwater exposure, addressing the material fatigue that degrades steel or aluminum strainers over multiple seasons. Whether you're running a weekend angler's center console, a liveaboard cruiser, or a commercial fishing vessel, intake filtration is non-negotiable for engine longevity and cooling efficiency.