GROCO ARG-2500S Bronze Raw-Water Strainer — 2-1/2" Hose, #304 SS Basket (34-ARG2500S)
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
The GROCO ARG-2500S is a large-capacity bronze raw-water strainer designed for 2-1/2 in. pipe or hose connections. Built for high-volume seawater intake on large vessels, it shares the same proven ARG-series construction — no tie rods, O-ring sealed cap and sight glass, and a tool-free #304 stainless steel basket — scaled up for the demanding flow requirements of large inboard engines, twin or triple engine installations, and high-capacity generator cooling systems. The see-through screw-on cap allows visual inspection of basket condition without disassembly.
Best Use Case: Ideal as a primary raw-water strainer on large inboard diesel engines, multi-engine installations, and high-volume generator cooling circuits on vessels 50 ft. and above with 2-1/2 in. seacock plumbing. Well-suited for commercial, charter, and offshore bluewater applications where maximum flow capacity and reliable sealing are non-negotiable. Not for use in potable water systems.
- Bronze body — corrosion-resistant for raw-water and seawater service
- #304 stainless steel filter basket — tool-free removal for quick cleaning
- See-through screw-on strainer cap — inspect basket condition without disassembly
- O-ring sealed cap and sight glass — no leaks under pressure or vacuum
- No tie rods — simplified, robust construction
- Spanner wrench holes in cover — compatible with SW-2531 wrench
- Installs with 2-1/2 in. pipe or hose connections
- Part No. ARG2500S | SKU: 34-ARG2500S
- Do not use chemical or abrasive cleaners on sight glass
Parts Desk Insights: The ARG-2500S is one of the largest strainers in the GROCO ARG series and is typically specified for vessels with 2-1/2 in. raw-water plumbing — confirm your seacock and hose ID before ordering. A dedicated O-ring replacement is available: see the O-Ring for ARG-2500-S. For drain wingnut and O-ring replacement on units manufactured before 08/01/01, see the GROCO ARG-506 Drain Wingnut and O-Ring. If your application requires a smaller strainer, see the GROCO ARG-2000S (2" Hose) or the GROCO ARG-1500S (1-1/2" Hose). Pair with a compatible seacock or ball valve for a complete through-hull assembly.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.