{"product_id":"tier1-spa-filter-replacement-for-waterway-817-4050-4-pack-high-flow-pleated-cartridges","title":"Tier1 Spa Filter Replacement for Waterway 817-4050 — 4-Pack High-Flow Pleated Cartridges","description":"\u003cstrong\u003eTier1 Replacement for Waterway Spa Filter 817-4050 (4pk) is a direct-fit replacement cartridge designed to restore clear, well-circulated spa water by trapping fine debris while maintaining strong flow.\u003c\/strong\u003e\n\n\u003cp\u003eIf your spa uses Waterway-style cartridges and you need reliable filtration without the hassle of custom sizing, this four-pack from Tier1 gives you ready-to-install replacements engineered for compatibility and performance. These cartridges match the common Waterway 817-4050 form factor and comparable aftermarket part numbers so they slide into existing filter housings with no modification. Built with a high-flow internal core and advanced pleated media, they balance filtration efficiency and pump protection for everyday spa use.\u003c\/p\u003e\n\n\u003ch3\u003eWill these cartridges fit my Waterway 817-4050 or equivalent filter housing?\u003c\/h3\u003e\n\u003cp\u003eYes — the Tier1 cartridges are sized to match the typical Waterway 817-4050 profile so they fit most compatible housings. Verify your existing cartridge dimensions before ordering to ensure exact compatibility.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eOverall length: 13-1\/16 inches for proper seating.\u003c\/li\u003e\n\u003cli\u003eOuter diameter: 5 inches to match standard housings.\u003c\/li\u003e\n\u003cli\u003eCompatible cross-reference numbers: Teleweir 50, Pleatco PWW50L series, Filbur FC-0172, Unicel 4CH-949 and others.\u003c\/li\u003e\n\u003cli\u003eSold as a 4-pack to replace multiple units at once.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does the filter media capture dirt while keeping flow steady?\u003c\/h3\u003e\n\u003cp\u003eThese cartridges use trilobal-shaped fibers rather than simple round fibers, which increases surface contact and particle capture without overly restricting water movement. The pleated construction provides large surface area and the supported internal core lets water pass through freely to your pump and heater.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eTrilobal dirt-lock fibers trap more fine particles, hair, and debris.\u003c\/li\u003e\n\u003cli\u003ePleated design increases filtration area for longer run times between cleanings.\u003c\/li\u003e\n\u003cli\u003eHigh-flow internal core protects pump performance and reduces pressure drops.\u003c\/li\u003e\n\u003cli\u003eEngineered to balance cleanliness and consistent circulation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAre these cartridges tested for durability and performance?\u003c\/h3\u003e\n\u003cp\u003eTier1 cartridges are independently evaluated to industry filtration protocols to verify performance and robustness. That testing helps ensure the cartridges hold pleat shape, resist premature collapse, and deliver expected water clarity under typical spa conditions.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eIndependently tested to NSF 50-related protocols for performance benchmarks.\u003c\/li\u003e\n\u003cli\u003eConstructed to resist distortion and maintain consistent filtration over service life.\u003c\/li\u003e\n\u003cli\u003eDesigned to avoid leakage or gaps that reduce effectiveness.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do I benefit from buying a four-pack versus single cartridges?\u003c\/h3\u003e\n\u003cp\u003eBuying a four-pack gives you immediate spares for staggered replacement schedules and reduces the frequency of repeat orders. It’s economical for homeowners who maintain multiple spas or prefer to swap all cartridges at once during seasonal service.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFour cartridges in one purchase for convenience and value.\u003c\/li\u003e\n\u003cli\u003eKeep one spare on hand to avoid downtime during replacements.\u003c\/li\u003e\n\u003cli\u003eIdeal for multi-spa properties or scheduled full-filter changes.\u003c\/li\u003e\n\u003cli\u003eConsistent filter media across replacements for predictable performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? Homeowners, property managers, and spa technicians who use Waterway 817-4050 or cross-referenced filter housings and want a dependable, easy-to-install replacement that improves particle capture without sacrificing circulation. Choose Tier1 when you need a pack of premium, dimension-matched cartridges to maintain water clarity and protect spa equipment between cleanings.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Do these replace Waterway part 817-4050 exactly?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes—these Tier1 cartridges match the 13-1\/16\" x 5\" dimensions and are compatible with Waterway 817-4050 and many cross-reference numbers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How often should I replace or clean these cartridges?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Clean regularly depending on use; replace based on condition or manufacturer guidance, typically every 6–12 months for residential spas.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Tier1","offers":[{"title":"Default Title","offer_id":56839773225300,"sku":"B07GSJ7453","price":141.9,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1063\/2652\/4244\/files\/tier1-front-packaging-waterway-817-4050.jpg?v=1787068418","url":"https:\/\/gardenluxe.co.uk\/products\/tier1-spa-filter-replacement-for-waterway-817-4050-4-pack-high-flow-pleated-cartridges","provider":"Gardenluxe Uk","version":"1.0","type":"link"}