GROCO Bronze Slotted Hull Scoop Strainer w/Access Door f/Up to 1-1/4" Thru Hull

The GROCO Bronze Slotted Hull Scoop Strainer with Access Door for up to 1-1/4" Thru Hull is a marine intake strainer engineered to protect through-hull fittings from debris, sediment, and foreign objects that compromise cooling water systems and seawater intake lines. Cast from C84400 bronze—a marine-grade alloy selected for superior corrosion resistance in saltwater environments—this strainer combines proven durability with practical serviceability for both inboard and outboard cooling applications.

The bronze hull scoop strainer's slotted-filter design maximizes flow area while capturing particles that would otherwise lodge in through-hull valves and impeller housings. The access door casting—also C84400 bronze—provides straightforward maintenance without removing the entire fitting, a feature that saves hauling time during routine flushing. Pressure relief holes machined into the door casting prevent blockage from creating dangerous back-pressure in the intake line, a critical safety feature when operating in debris-rich waters or after winter lay-ups when sediment accumulates in raw-water circuits.

This strainer accommodates through-hulls up to 1-1/4" diameter, the standard size for mid-size sport fishing boats, cruising sailboats, and commercial fishing vessels operating in coastal waters. Weekend anglers running inboard systems and serious offshore captains relying on reliable engine cooling will appreciate the bronze construction, which outlasts zinc-plated alternatives in salt air and won't corrode or pit like ferrous metals. The compact design (4 x 2 x 7 inches) suits tight engine room layouts without requiring hull modification beyond the existing through-hull penetration.

GROCO strainers are recognized throughout the marine industry for meeting the filtration and durability standards required of OEM-level cooling components. The slotted-filter strainer remains the most common type aboard working vessels because it offers the lowest flow restriction while providing the mechanical protection that engine manufacturers demand. For any vessel with raw-water cooling, this bronze strainer represents the baseline for intake protection and long-term engine reliability.