{"product_id":"hayward-cax-3511-injection-check-valve-1-4in","title":"Hayward CAX-3511 Injection Check Valve - 1\/4in","description":"\u003cp\u003e\u003cstrong\u003eWhat This Part Is Used For\u003c\/strong\u003e\u003cbr\u003e The CAX-3511 injection check valve - 1\/4in is used in chemical feed systems to prevent backflow into injection tubing. It allows chemical to flow in one direction toward the return line. \u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy This Part Matters\u003c\/strong\u003e\u003cbr\u003e A failed check valve can allow pool water to enter feed lines and damage pumps. Replacing it maintains proper dosing and protects chemical equipment. Reliable one-way flow prevents contamination and system corrosion. \u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features and Specifications\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eManufacturer part number CAX-3511\u003c\/li\u003e\n\u003cli\u003eInjection check valve\u003c\/li\u003e\n\u003cli\u003e1\/4in size\u003c\/li\u003e\n\u003cli\u003eOne-way flow design\u003c\/li\u003e\n\u003cli\u003eFor compatible chemical feed systems\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eInstallation and Fitment Guidance\u003c\/strong\u003e\u003cbr\u003e Install in line with correct flow direction toward the pool return. Inspect tubing for wear before reconnection. Confirm by manufacturer part number before ordering. \u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAbout the Hayward Brand\u003c\/strong\u003e\u003cbr\u003e Hayward chemical control systems integrate pumps, sensors, and injection components. Proper check valves protect feed equipment and plumbing. Genuine parts maintain safe chemical dosing. \u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon Service Context\u003c\/strong\u003e\u003cbr\u003e Replaced during chemical pump maintenance. Often addressed when feed lines show signs of backflow. \u003c\/p\u003e","brand":"Hayward","offers":[{"title":"Default Title","offer_id":52050160255250,"sku":"CAX-3511","price":48.35,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/2279\/1186\/files\/HPPCAX3511_0.jpg?v=1771891999","url":"https:\/\/www.aquaterrabackyard.com\/products\/hayward-cax-3511-injection-check-valve-1-4in","provider":"Aqua Terra Backyard","version":"1.0","type":"link"}