GROCO ARG-500 Series 1/2" Raw Water Strainer w/Stainless Steel Basket

The GROCO ARG-500 Series 1/2" Raw Water Strainer with Stainless Steel Basket is a purpose-built intake protection system designed for marine engine cooling and raw water applications. This strainer prevents debris, sediment, and marine growth from entering your engine's cooling system—a critical safeguard for any vessel operating in coastal, offshore, or inland waters where raw water intake is standard practice.

The strainer features a removable mounting system that allows complete maintenance without tools, eliminating downtime when you need to clean or service the basket. The one-piece molded sight glass provides clear visibility of filter condition, letting you monitor debris accumulation at a glance. Bonding connections on both sides ensure electrical continuity in corrosive saltwater environments, while O-ring seals on all joining surfaces prevent leakage under operating pressure. The #304 stainless steel basket resists corrosion in harsh marine conditions and handles the volume demands of typical engine cooling systems. An improved drain plug accelerates water removal during maintenance.

This unit is essential for boat owners and operators who run raw water-cooled engines—from fishing vessels and commercial workboats to larger cruising sailboats and trawlers. Whether you're running weekend offshore fishing trips or managing a working boat that sees daily use, routine strainer maintenance prevents expensive engine damage from cooling system blockage. The 1/2" port size matches common marine engine intake configurations, making this a direct replacement or upgrade on many installations where corrosion resistance and ease of service matter most.