GROCO ARG-750 Series 3/4" Raw Water Strainer w/Non-Metallic Plastic Basket

The GROCO ARG-750 Series 3/4" Raw Water Strainer with Non-Metallic Plastic Basket is an essential intake protection component for any serious cruiser or fishing vessel. Raw water cooling systems draw directly from the sea, lake, or river, and debris—sand, vegetation, shell fragments, and sediment—can catastrophically foul your engine's heat exchanger and cooling passages in minutes. This strainer sits at the through-hull inlet, trapping contaminants before they reach your powerplant, giving you the confidence to operate in coastal shallows, rivers, and coastal waters without fear of thermal shutdown or expensive repair bills.

Built to GROCO's marine-grade standards, the ARG-750 features a non-metallic plastic basket that resists corrosion and saltwater degradation far better than traditional metal designs—critical for vessels operating in saltwater environments where galvanic corrosion can weaken strainer internals over seasons of use. The body incorporates bonding connections on both sides, ensuring proper electrical continuity and cathodic protection integration across your cooling circuit. Tool-free removal of the basket assembly simplifies mid-season maintenance; you can rinse or replace the basket in seconds without breaking out wrenches, keeping you on the water instead of at the workbench. O-ring seals at all joining surfaces guarantee a watertight connection that won't weep even under the pressure spikes that occur during cold-start operation or high-RPM running.

Anglers and cruising boaters who spend extended time in murky coastal areas, shallow rivers, or weedy lakes benefit most from the ARG-750's heavy-duty basket capacity and quick-service design. The 3/4" port size accommodates most mid-range inboard and I/O cooling systems; verify your through-hull fitting diameter and inlet hose ID before purchase to ensure proper fit. Installation requires a standard through-hull configuration with appropriate seacock isolation; always isolate the raw water intake with a ball valve before servicing the strainer to prevent accidental flooding. At 4.4 pounds and compact at 5 x 5 x 10 inches, the ARG-750 mounts neatly in engine compartments from express cruisers to commercial fishing boats, offering 20+ years of reliable service when maintained annually and stored dry during layup.