GROCO Bronze Slotted Hull Scoop Strainer w/Access Door f/Up to 3" Thru Hull

The GROCO Bronze Slotted Hull Scoop Strainer with Access Door for Up to 3" Thru Hull (ASC-3000) is a marine intake strainer engineered to prevent debris, seaweed, and foreign material from entering raw water systems on vessels with through-hull fittings up to 3 inches in diameter. Built from C84400 bronze—a marine-grade alloy selected for superior corrosion resistance in saltwater environments—this strainer combines durability with functional accessibility that serious boaters depend on for reliable engine cooling and system protection.

The access door design is the key feature that distinguishes this hull scoop strainer from simpler basket-style alternatives. Rather than requiring divers or haul-out to clear blockages, the removable door grants deck-level access to the strainer basket and through-hull assembly—a significant advantage for extended cruising or fishing operations in debris-prone waters. The cast filter slots provide consistent flow while capturing particles that would otherwise damage impellers or restrict cooling. Pressure relief holes integrated into the door casting prevent suction lock-off and allow trapped air to escape during installation, ensuring proper seating and minimizing installation frustration.

This strainer is ideal for cruising sailboats, offshore fishing vessels, and trawlers operating in coastal or brackish waters where intake fouling is a recurring issue. Weekend boaters working in kelp-heavy regions and commercial operators managing multiple engines will recognize the maintenance-time savings the access door provides. At 13.4 lbs and compact 8x8x15-inch dimensions, the ASC-3000 installs where space is limited without sacrificing bronze construction quality.

GROCO has held the marine hardware standard for raw water strainers across the industry for decades, and this model represents their proven approach to combining accessibility with longevity. The bronze construction resists the galvanic corrosion that degrades lesser materials in salt spray exposure, making it a buy-once component for systems that will outlast the boat itself.