{"product_id":"wilkins-rk4-350ck2-repair-kit-2-check-assembly-2-12-4","title":"Wilkins RK4-350CK2 | Repair Kit #2 Check Assembly, 2-1\/2\" – 4\"","description":"\u003cp\u003e\nThe Wilkins RK4-350CK2 is a comprehensive #2 Check Assembly repair kit designed for mid-range backflow prevention valves, ensuring reliable performance and extended service life across multiple model families.\n\u003c\/p\u003e\n\n\u003cp\u003e \u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003e\u003cu\u003eKey Specifications:\u003c\/u\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n    \u003cstrong\u003eCompatible Sizes:\u003c\/strong\u003e\n    2-1\/2\", 3\", 4\" Inches\n  \u003c\/li\u003e\n\n  \u003cli\u003e\n    \u003cstrong\u003eCompatible Models:\u003c\/strong\u003e\n    350, 350A, 350DA, 375A, 450DA, 475DAV\n  \u003c\/li\u003e\n\n  \u003cli\u003e\n    \u003cstrong\u003eKit Components:\u003c\/strong\u003e\n    9 essential replacement parts\n  \u003c\/li\u003e\n\n  \u003cli\u003e\n    \u003cstrong\u003eApplication:\u003c\/strong\u003e\n    Second check assembly replacement\n  \u003c\/li\u003e\n\n  \u003cli\u003e\n    \u003cstrong\u003eDesign Focus:\u003c\/strong\u003e\n    Mid-range valve maintenance\n  \u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e \u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003e\u003cu\u003eOther Related Variants:\u003c\/u\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n    \u003cstrong\u003eRK212-350CK2:\u003c\/strong\u003e\n    Limited to 2-1\/2\" – 3\" sizes\n  \u003c\/li\u003e\n  \u003cli\u003e\n    \u003cstrong\u003eRK6-350CK2:\u003c\/strong\u003e\n    For 6 Inches valves\n  \u003c\/li\u003e\n  \u003cli\u003e\n    \u003cstrong\u003eRK8-350CK2:\u003c\/strong\u003e\n    For 8\" – 12\" large-diameter valves\n  \u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e \u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003e\u003cu\u003eMaterials:\u003c\/u\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSeat Retainer #2\u003c\/li\u003e\n  \u003cli\u003eO-Ring Check\u003c\/li\u003e\n  \u003cli\u003ePoppet Retainer with Bolt\u003c\/li\u003e\n  \u003cli\u003eWasher for Poppet Bolt\u003c\/li\u003e\n  \u003cli\u003eO-Ring for Poppet Bolt\u003c\/li\u003e\n  \u003cli\u003eSeal Ring\u003c\/li\u003e\n  \u003cli\u003eSeat Assembly #2 Poppet\u003c\/li\u003e\n  \u003cli\u003eLubricant\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e \u003c\/p\u003e\n\n\u003ch3\u003e\u003cstrong\u003eTypical Installation:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp style=\"background: #f8f9fb; padding: 12px 14px; margin: 0; line-height: 1.7; color: #333;\"\u003e\nThis Zurn RK4-350CK2 repair kit is designed for servicing second check assemblies in backflow prevention systems installed in commercial, industrial, and residential water distribution applications where mid-range valve maintenance is required across the 350, 375, 450, and 475 model families.\n\u003c\/p\u003e\n\n\u003cp\u003e \u003c\/p\u003e\n\n\u003ch3\u003e\u003cstrong\u003eStandards Compliance:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp style=\"background: #f8f9fb; border-left: 4px solid #1d85af; padding: 12px 14px; margin: 0; line-height: 1.7; color: #333;\"\u003e\nDesigned for use with ASSE-listed and approved backflow prevention assemblies\n\u003c\/p\u003e\n\n\u003cp\u003e \u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003e\u003cu\u003eFeatures \u0026amp; Benefits:\u003c\/u\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eComplete Assembly Kit:\u003c\/strong\u003e Includes all 9 components needed for comprehensive #2 check assembly replacement, eliminating the need for separate part orders.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMulti-Model Compatibility:\u003c\/strong\u003e The Wilkins RK4-350CK2 supports multiple backflow model families (350, 350A, 350DA, 375A, 450DA, 475DAV) across three valve sizes, simplifying inventory management.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExtended Service Life:\u003c\/strong\u003e Quality-engineered components including seat assemblies, O-rings, and seal rings restore optimal valve performance and extend operational reliability.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSimplified Maintenance:\u003c\/strong\u003e Pre-packaged with all necessary parts and lubricant for efficient field service and reduced downtime during routine maintenance procedures.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e \u003c\/p\u003e\n\n\u003ch3\u003e\u003cstrong\u003eFAQ\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e \u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What valve models and sizes is the RK4-350CK2 compatible with?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: The Zurn RK4-350CK2 is compatible with 2-1\/2\", 3\", and 4\" Models 375A and 350ADA, as well as 4\" Models 375, 350, 475, and 450. It supports multiple backflow prevention valve families requiring second check assembly replacement.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What components are included in this repair kit?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: The kit includes Seat Retainer #2, O-Ring Check, Bolt Poppet Retainer, Washer Poppet Bolt, O-Ring Poppet Bolt, Poppet Retainer, Seal Ring, Seat Assembly #2 Poppet, and Lubricant—everything needed for complete #2 check assembly replacement.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How does the RK4-350CK2 differ from other variants?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: The RK4-350CK2 covers mid-range sizes (2-1\/2\" to 4\"), while RK212-350CK2 is limited to smaller 2-1\/2\"–3\" sizes, RK6-350CK2 serves 6\" valves, and RK8-350CK2 handles large 8\"–12\" diameter applications.\u003c\/p\u003e\n\n\u003cp\u003e \u003c\/p\u003e\n\n\u003cdiv id=\"W3TucRPBpqQA9ARvwg6ni-content\"\u003e\n  \u003cp\u003e\n    \u003cspan\u003e\n      \u003cstrong\u003eNOTICE:\u003c\/strong\u003e\n      Do not use with water that is unsafe or of unknown quality without adequate\n      disinfection either before or after the system.\n    \u003c\/span\u003e\n  \u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cp\u003e\n  \u003ci\u003e\n    \"Hydrate Everyone, Everywhere!\" BottleFillingStations.com |\n    \u003ca rel=\"noopener\" href=\"https:\/\/bottlefillingstations.com\/pages\/contact-us\" target=\"_blank\"\u003e\n      Contact us\n    \u003c\/a\u003e\n  \u003c\/i\u003e\n\u003c\/p\u003e","brand":"Zurn Wilkins","offers":[{"title":"Default Title","offer_id":42914909651007,"sku":"RK4-350CK2","price":460.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0793\/0985\/files\/RK4-350CK2_AF.png?v=1770568761","url":"https:\/\/bottlefillingstations.com\/products\/wilkins-rk4-350ck2-repair-kit-2-check-assembly-2-12-4","provider":"BottleFillingStations.com","version":"1.0","type":"link"}