{"product_id":"pool-filter-lock-knob-kit-cx900g-cx900da-hayward-cartridge-replacement","title":"Pool Filter Knob Kit – CX900G \u0026 CX900DA Replacement Parts","description":"\n\u003ch2\u003ePool Filter Lock Knob Kit – CX900G \u0026amp; CX900DA Replacement Parts\u003c\/h2\u003e\n\u003cp\u003eKeep your swimming pool running crystal-clear with this complete \u003cstrong\u003ePool Filter Lock Knob Replacement Kit\u003c\/strong\u003e, purpose-built for Hayward Star-Clear Plus cartridge filters. Whether you need just the locking knob (CX900G) or the full hardware set (CX900DA), this kit delivers a secure, leak-free fit and hassle-free installation — no special tools required.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's in the Box?\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e1 × CX900G Locking Knob\u003c\/strong\u003e – Weatherproof, UV-resistant construction for lasting outdoor use\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e1 × CX900DA Knob Kit\u003c\/strong\u003e, which includes:\n    \u003cul\u003e\n      \u003cli\u003e2 × CX900W Washers\u003c\/li\u003e\n      \u003cli\u003e1 × CX900D Guide Cone\u003c\/li\u003e\n      \u003cli\u003e1 × C900J E-Clip\u003c\/li\u003e\n      \u003cli\u003e1 × CX900H O-Ring\u003c\/li\u003e\n      \u003cli\u003e1 × CX900F Filter Head O-Ring\u003c\/li\u003e\n      \u003cli\u003e1 × ECX1322A Directional Vent Valve with O-Ring\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBroad Compatibility:\u003c\/strong\u003e Fits Hayward Star-Clear Plus cartridge filter models C751, C7512, C900, C9002(S), C1200, C12002(S), C1502, C17502(S), and C2002\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWaterproof \u0026amp; Sunproof:\u003c\/strong\u003e The CX900G knob is crafted from high-grade, weather-resistant material designed to withstand prolonged pool-side exposure\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStops Leaks at the Source:\u003c\/strong\u003e The CX900DA kit seals the top of the filter housing, stopping drips and keeping your filtration system operating at peak efficiency\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEasy Filter Maintenance:\u003c\/strong\u003e The guide cone accurately aligns the filter top onto the threaded rod, making routine cleaning quick and simple\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFast Installation:\u003c\/strong\u003e Remove the worn part, fit the new component — done. No specialist knowledge needed\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eInstallation Tip\u003c\/h3\u003e\n\u003cp\u003eWhen fitting the E-Ring (C900J), press the edge into the slot by hand first to seat it, then use a flat tool to push it fully and securely into the groove.\u003c\/p\u003e\n\n\u003ch3\u003eCompatible Filter Models\u003c\/h3\u003e\n\u003cp\u003eHayward Star-Clear Plus: \u003cstrong\u003eC751 | C7512 | C900 | C9002(S) | C1200 | C12002(S) | C1502 | C17502(S) | C2002\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMade in Mainland China.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch3\u003eWhy Maintain Your Pool Filter?\u003c\/h3\u003e\n\u003cp\u003eA properly functioning cartridge filter is essential for safe, clean pool water. The \u003ca href=\"https:\/\/www.cdc.gov\/healthywater\/swimming\/residential\/disinfection-testing.html\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eCDC recommends regular pool equipment maintenance\u003c\/a\u003e to ensure healthy swimming conditions. Replacing worn knobs and seals promptly prevents water bypass and keeps filtration effective.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products You May Need\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/1-4w-solar-bird-bath-fountain-pump-garden-pond-fish-tank-1\"\u003e1.4W Solar Bird Bath Fountain Pump – Pond, Garden \u0026amp; Fish Tank\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/1-inch-threaded-brass-ball-valve-water-gas-oil-flow-control\"\u003e1-Inch Threaded Brass Ball Valve – Water, Gas \u0026amp; Oil Flow Control\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: Which Hayward filter models is this CX900G and CX900DA knob kit compatible with?\u003c\/h4\u003e\n\u003cp\u003eA: This pool filter lock knob kit is compatible with Hayward Star-Clear Plus cartridge filter models C751, C7512, C900, C9002(S), C1200, C12002(S), C1502, C17502(S), and C2002. Always verify your model number before ordering.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What does the CX900DA Knob Kit include?\u003c\/h4\u003e\n\u003cp\u003eA: The CX900DA Knob Kit contains 2 × CX900W Washers, 1 × CX900D Guide Cone, 1 × C900J E-Clip, 1 × CX900H O-Ring, 1 × CX900F Filter Head O-Ring, and 1 × ECX1322A Directional Vent Valve with O-Ring — everything you need to fully restore the top assembly of your cartridge filter.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How difficult is it to install this pool filter knob kit?\u003c\/h4\u003e\n\u003cp\u003eA: Installation is straightforward. Simply remove the damaged or worn component from your filter and fit the new replacement part. The guide cone helps align the filter lid onto the threaded rod easily. For the E-Ring, press it into the slot by hand first, then use a flat tool to seat it completely.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Will this kit stop my pool filter from leaking at the top?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. The CX900DA kit includes the O-rings and vent valve that seal the filter housing top. Replacing worn O-rings and the directional vent valve is the most common fix for leaks occurring at the top of Hayward cartridge filter housings.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Is this knob kit weatherproof for outdoor pool use?\u003c\/h4\u003e\n\u003cp\u003eA: Absolutely. The CX900G locking knob is made from high-grade waterproof and UV-resistant material, making it well-suited for year-round outdoor pool environments.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Which Hayward filter models is this CX900G and CX900DA knob kit compatible with?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This pool filter lock knob kit is compatible with Hayward Star-Clear Plus cartridge filter models C751, C7512, C900, C9002(S), C1200, C12002(S), C1502, C17502(S), and C2002. Always verify your model number before ordering.\"}}, {\"@type\": \"Question\", \"name\": \"What does the CX900DA Knob Kit include?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The CX900DA Knob Kit contains 2 × CX900W Washers, 1 × CX900D Guide Cone, 1 × C900J E-Clip, 1 × CX900H O-Ring, 1 × CX900F Filter Head O-Ring, and 1 × ECX1322A Directional Vent Valve with O-Ring — everything you need to fully restore the top assembly of your cartridge filter.\"}}, {\"@type\": \"Question\", \"name\": \"How difficult is it to install this pool filter knob kit?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Installation is straightforward. Simply remove the damaged or worn component from your filter and fit the new replacement part. The guide cone helps align the filter lid onto the threaded rod easily. 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The CX900G locking knob is made from high-grade waterproof and UV-resistant material, making it well-suited for year-round outdoor pool environments.\"}}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"BreadcrumbList\", \"itemListElement\": [{\"@type\": \"ListItem\", \"position\": 1, \"name\": \"Home\", \"item\": \"https:\/\/oasis-select.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Outdoor \u0026 Sports\", \"item\": \"https:\/\/oasis-select.com\/collections\/outdoor-sports\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"Pool Filter Knob Kit – CX900G \u0026 CX900DA Replacement Parts\", \"item\": \"https:\/\/oasis-select.com\/products\/pool-filter-lock-knob-kit-cx900g-cx900da-hayward-cartridge-replacement\"}]}\u003c\/script\u003e","brand":"Oasis Select","offers":[{"title":"Default Title","offer_id":47748070244457,"sku":"\u003cnone\u003e","price":100.56,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0679\/7931\/3257\/files\/S1005f8b4c9e44bf3b8aafcd1e4de5ee2G.webp?v=1783081026","url":"https:\/\/oasis-select.com\/products\/pool-filter-lock-knob-kit-cx900g-cx900da-hayward-cartridge-replacement","provider":"Oasis Select","version":"1.0","type":"link"}