GROCO ARG-2500 Series 2-1/2″ Raw Water Strainer Monel Basket
Original price was: $442.79.$238.80Current price is: $238.80.
Description
GROCO ARG-2500 Series 2-1/2″ Raw Water Strainer Monel Basket – ARG-2500
The GROCO ARG-2500 Raw Water Strainer is a heavy-duty 2-1/2″ NPT filtration system designed for large marine engines, air conditioning units, and generators. This specific model features a Monel basket, which offers the highest level of corrosion resistance available, making it the industry standard for saltwater applications.
Robust Filtration and Design
The ARG-2500 is part of GROCO’s premier series, known for its tie-rod-free design. This eliminates the common leak points and gaskets found in older style strainers.
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Monel Filter Basket: Unlike standard 304 stainless steel, the Monel basket is virtually immune to the pitting and corrosion caused by constant saltwater exposure, ensuring long-term reliability.
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One-Piece Sight Glass: Features a durable, molded acrylic cylinder that provides a clear view of the basket for easy inspection without the structural weakness of traditional tie rods.
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Tool-Free Maintenance: The spin-off wingnut cap and quick-release mounting strap allow you to clean the basket or remove the entire unit for service without specialized tools.
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Bronze Construction: The head casting is made from C84400 bronze, providing a sturdy, professional-grade foundation that handles high-flow conditions.
| Feature | Details |
| Model Number | ARG-2500-S |
| Pipe Size | 2-1/2″ NPT |
| Basket Material | Monel (High-Corrosion Resistance) |
| Housing Material | Serviceable Bronze |
| Height | Approx. 14.5 Inches |
| Width | Approx. 7.25 Inches |
| Flow Rate | Optimized for high-horsepower diesel/gas engines |
Installation & Maintenance Tips
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Mounting: The ARG series features a mounting bracket integrated into the casting. Ensure it is securely fastened to a bulkhead to prevent vibration from stressing your plumbing.
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Bonding: Always connect the strainer to your boat’s central bonding system using the provided grounding lug to prevent galvanic corrosion.
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O-Ring Care: When cleaning the basket, inspect the cap O-ring. A light coating of silicone grease (not petroleum jelly) will ensure a vacuum-tight seal and prevent the pump from sucking air.
Maintenance & Compatibility
For routine maintenance, this strainer uses the ARG-756 Drain Plug (for units built after 2008). If you are installing this on a high-demand vessel, it pairs perfectly with the Paragon Senior 12V Water Pressure System for a complete commercial-grade plumbing setup.











