Sherwood Pump 11803-SHW Sea Strainer Replacement O-Ring Gasket for 1", 1-1/4" & 1-1/2" Strainers

Sherwood Pump

<h3>Sherwood Pump: The Marine Industry&apos;s Trusted Cooling Solution</h3><p><strong>Sherwood Pump</strong> has earned its place as one of the most respected names in marine fluid management. With roots stretching back more than a century — tracing to a copper and brass plumbing business co-founded by William Sherwood and David Buick — the brand has evolved from a modest workshop operation into a globally recognized manufacturer now operating under the Pentair family of brands. Today, Sherwood&apos;s reputation rests on a simple but vital promise: keep your engine cool, no matter what the water throws at it.</p><h3>OEM Trust, Built Over Decades</h3><p>What sets Sherwood apart from the competition is the confidence the world&apos;s top marine engine builders have placed in its products. Sherwood is recognized as an OEM provider for many leading marine engine manufacturers, meaning its pumps are engineered and tested to the exact specifications demanded by engine designers — not just reverse-engineered aftermarket alternatives. That original-equipment pedigree translates directly to reliability on the water.</p><p>At the heart of Sherwood&apos;s lineup are its <a href="/7562-sherwood-pump-water-pump-components-201276">Water Pump &amp; Components</a>, which represent the brand&apos;s broadest and most comprehensive product family. From complete raw water pump assemblies to individual rebuild components, these products are crafted to deliver high-volume water flow and dependable performance across a wide range of vessel types and engine configurations.</p><h3>Engine Cooling, From Pump to Impeller</h3><p>Sherwood&apos;s <a href="/7562-sherwood-pump-engine-cooling-pumps-accessories-200368">Engine Cooling Pumps &amp; Accessories</a> form the backbone of the brand&apos;s catalog. Raw water cooling is the lifeblood of any inboard marine engine, and Sherwood&apos;s pumps are engineered to maintain precise, consistent water flow under the demanding conditions of continuous engine operation. The brand offers pumps accommodating a wide variety of flow requirements, drive mechanisms, inlet restrictions, pressures, and port sizes — making it straightforward to find the right match for virtually any engine application.</p><p>For boaters sourcing a direct factory-equivalent replacement, Sherwood&apos;s <a href="/7562-sherwood-pump-engine-water-pump-2208">Engine Water Pumps</a> are designed and tested specifically for their intended engine applications, helping to maintain engine warranty compliance while delivering the durability expected from an OEM-specified part.</p><p>No cooling pump discussion is complete without addressing the rubber <a href="/7562-sherwood-pump-impellers-200573">Impellers</a> that drive water through the system. Sherwood&apos;s neoprene impellers are available in multiple series — including the well-known G Series and P Series lines — and are engineered to flex and recover reliably under continuous use. Keeping a fresh impeller on hand is one of the smartest preventive maintenance steps any boater can take.</p><p>Rounding out the catalog, Sherwood&apos;s <a href="/7562-sherwood-pump-flexible-impeller-engine-driven-pumps-impellers-parts-200425">Flexible Impeller Engine Driven Pumps, Impellers &amp; Parts</a> extend the brand&apos;s expertise to a broader range of flexible-impeller pump applications, including rebuild kits, wear plates, cam liners, and cover gaskets — everything needed to service a pump rather than replace it outright.</p><h3>Built for the Marine Environment</h3><p>Sherwood pumps are engineered with the harsh realities of the marine environment in mind. Non-corrosive bronze housings, precision-machined wear surfaces, and readily available repair kits mean that a Sherwood pump is not just a component — it&apos;s a long-term investment in the health of your vessel&apos;s engine. Whether you&apos;re sourcing a complete pump assembly, a set of replacement impellers, or a minor repair kit for a scheduled service, Sherwood&apos;s catalog covers the full spectrum of marine cooling pump needs.</p>