{"product_id":"ussealpumpshaftsealnorthtristar58ps4280ussps4280","title":"US Seal Pump Shaft Seal North\/Tristar 5\/8\" | PS-4280","description":"\u003cdiv\u003e\n\u003ch2\u003eU.S. Seal PS-4280 Premium Shaft Seal Assembly (5\/8″ Shaft, Wet-End Pump Seal)\u003c\/h2\u003e\n\u003cp\u003eThe U.S. Seal PS-4280 is a heavy-duty mechanical shaft seal designed for longevity, chemical resistance, and reliable sealing in pool and spa pumps. It replaces the wet-end seal where the motor shaft penetrates the pump housing — a critical point to prevent leaks and maintain proper suction.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e5\/8″ impeller shaft diameter — fits many common pool and spa pumps using this shaft size.\u003c\/li\u003e\n\u003cli\u003ePremium materials — Viton elastomer, carbon-graphite primary ring, ceramic sealing face, and stainless-steel hardware for enhanced chemical, heat, and wear resistance.\u003c\/li\u003e\n\u003cli\u003eReverse-style mechanical seal — designed for wet-end installation to provide strong, pressure-resistant sealing under operating conditions.\u003c\/li\u003e\n\u003cli\u003eIdeal for saltwater, ozone, or bromine systems — superior chemical resistance improves durability compared to standard seals.\u003c\/li\u003e\n\u003cli\u003eBroad compatibility — suitable for many popular pump brands and models, reducing the need for multiple part numbers.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eManufacturer: U.S. Seal\u003c\/li\u003e\n\u003cli\u003ePart Number: PS-4280\u003c\/li\u003e\n\u003cli\u003eShaft Size: 5\/8″ (0.625″) impeller shaft\u003c\/li\u003e\n\u003cli\u003eSeal Type: Mechanical shaft seal (reverse-style, wet-end application)\u003c\/li\u003e\n\u003cli\u003eSeal Materials: Viton elastomer, carbon-graphite ring, ceramic sealing face, stainless-steel hardware\u003c\/li\u003e\n\u003cli\u003eApplications: Replacement seal for pool and spa pumps, including saltwater and chemically treated systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhen to Use \/ Replace\u003c\/h3\u003e\n\u003cp\u003eInstall PS-4280 during pump rebuilds, seal replacements, or when existing wet-end seals show leaks, wear, or chemical degradation. Because this seal is built for demanding conditions — including salt, ozone, and high-bather load systems — it’s especially useful if your pool uses aggressive sanitizers or operates year-round.\u003c\/p\u003e\n\u003ch3\u003eInstallation Tips\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eShut off power and drain the pump completely before disassembly.\u003c\/li\u003e\n\u003cli\u003eThoroughly clean and inspect the shaft and seal housing — even minor nicks or corrosion can lead to seal failure.\u003c\/li\u003e\n\u003cli\u003eLightly lubricate the new seal’s ceramic face with a pool-safe lubricant to avoid dry-start wear. Avoid petroleum-based oils that can degrade the elastomer.\u003c\/li\u003e\n\u003cli\u003eSeat the new seal carefully, ensuring flat, even contact. Reassemble the pump wet-end per manufacturer instructions, and test under pressure to verify sealing before full operation.\u003c\/li\u003e\n\u003cli\u003eInspect periodically for leaks, especially after prolonged shutdowns or chemical imbalance events. Prompt replacement can prevent costly pump or motor damage.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhy Choose PS-4280\u003c\/h3\u003e\n\u003cp\u003eThe U.S. Seal PS-4280 stands out for its premium materials and chemical resilience — making it a reliable, long-lasting choice for pool and spa pumps. Whether you’re performing routine maintenance or seeking a durable upgrade for saltwater or heavily treated systems, this seal helps ensure tight, leak-free operation and extends pump life by protecting internal components from water intrusion and corrosion.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"USSeal","offers":[{"title":"Default Title","offer_id":46797794312367,"sku":"PS-4280","price":17.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/6415\/2239\/files\/us-seal-pump-shaft-seal-northtristar-58-ps-4280-pump-parts-9570900.jpg?v=1777067437","url":"https:\/\/freshized.com\/products\/ussealpumpshaftsealnorthtristar58ps4280ussps4280","provider":"Freshized","version":"1.0","type":"link"}