{"product_id":"hayward-sx311mas-lateral-holder-assembly-elbow-included","title":"Hayward SX311MAS Lateral Holder Assembly (Elbow Included)","description":"\u003cdiv style=\"font-family: Arial, Helvetica, sans-serif; color: #263238; line-height: 1.65;\"\u003e\n\n  \u003cdiv style=\"border: 1px solid #d7e3e7; border-radius: 10px; padding: 24px; background-color: #ffffff;\"\u003e\n\n\u003ch2 style=\"margin: 0 0 14px; color: #087f8c; font-size: 26px;\"\u003e\n  Hayward SX311MAS Lateral Holder Assembly with Bottom Vertical Pipe and Bottom Elbow\n\u003c\/h2\u003e\n\n\u003cp style=\"margin: 0 0 16px;\"\u003e\n  The \u003cstrong\u003eHayward SX311MAS Lateral Holder Assembly\u003c\/strong\u003e is a genuine OEM internal filter replacement part for select \u003cstrong\u003eHayward ProSeries high-rate sand filters\u003c\/strong\u003e. This assembly is designed to replace the lower internal underdrain section that supports proper water movement through the sand bed during filtration and backwashing.\n\u003c\/p\u003e\n\n\u003cp style=\"margin: 0 0 20px;\"\u003e\n  Hayward identifies the SX311MAS as the \u003cstrong\u003elateral holder assembly, bottom vertical pipe, and bottom elbow assembly\u003c\/strong\u003e for the \u003cstrong\u003eHayward ProSeries S311SX\u003c\/strong\u003e. If your original internal assembly is cracked, worn, damaged, or no longer aligning correctly, this OEM replacement helps restore proper internal fit and function.\n\u003c\/p\u003e\n\n\u003cdiv style=\"background-color: #eef8fa; border-left: 5px solid #087f8c; padding: 16px 18px; margin: 0 0 22px;\"\u003e\n  \u003cstrong style=\"color: #075d67;\"\u003eImportant Compatibility Note:\u003c\/strong\u003e\u003cbr\u003e\n  This part is intended for the \u003cstrong\u003eHayward ProSeries S311SX\u003c\/strong\u003e. Please confirm your filter model number from the label on the tank before ordering. If you have a different model, the correct internal assembly may be different.\n\u003c\/div\u003e\n\n\u003ch3 style=\"color: #087f8c; margin: 0 0 10px; font-size: 21px;\"\u003e\n  Product Features\n\u003c\/h3\u003e\n\n\u003cul style=\"margin: 0 0 22px; padding-left: 22px;\"\u003e\n  \u003cli\u003e\u003cstrong\u003eGenuine Hayward replacement part\u003c\/strong\u003e\u003c\/li\u003e\n  \u003cli\u003eManufacturer part number: \u003cstrong\u003eSX311MAS\u003c\/strong\u003e\n\u003c\/li\u003e\n  \u003cli\u003eDesigned for Hayward \u003cstrong\u003eProSeries S311SX\u003c\/strong\u003e sand filters\u003c\/li\u003e\n  \u003cli\u003eIncludes the \u003cstrong\u003elateral holder assembly\u003c\/strong\u003e, \u003cstrong\u003ebottom vertical pipe\u003c\/strong\u003e, and \u003cstrong\u003ebottom elbow assembly\u003c\/strong\u003e\n\u003c\/li\u003e\n  \u003cli\u003eHelps maintain proper internal water flow through the filter during filtration and backwash cycles\u003c\/li\u003e\n  \u003cli\u003eDirect OEM replacement for a worn, cracked, or damaged original assembly\u003c\/li\u003e\n  \u003cli\u003eEngineered for in-ground pool filter applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"color: #087f8c; margin: 0 0 10px; font-size: 21px;\"\u003e\n  Compatible Filter Model\n\u003c\/h3\u003e\n\n\u003cdiv style=\"overflow-x: auto; margin-bottom: 22px;\"\u003e\n  \u003ctable style=\"width: 100%; border-collapse: collapse; min-width: 460px;\"\u003e\n    \u003cthead\u003e\n      \u003ctr style=\"background-color: #087f8c; color: #ffffff;\"\u003e\n        \u003cth style=\"padding: 11px; border: 1px solid #d7e3e7; text-align: left;\"\u003eBrand\u003c\/th\u003e\n        \u003cth style=\"padding: 11px; border: 1px solid #d7e3e7; text-align: left;\"\u003eSeries\u003c\/th\u003e\n        \u003cth style=\"padding: 11px; border: 1px solid #d7e3e7; text-align: left;\"\u003eCompatible Model\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding: 11px; border: 1px solid #d7e3e7;\"\u003eHayward\u003c\/td\u003e\n        \u003ctd style=\"padding: 11px; border: 1px solid #d7e3e7;\"\u003eProSeries High-Rate Sand Filter\u003c\/td\u003e\n        \u003ctd style=\"padding: 11px; border: 1px solid #d7e3e7;\"\u003eS311SX\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3 style=\"color: #087f8c; margin: 0 0 10px; font-size: 21px;\"\u003e\n  What This Part Does\n\u003c\/h3\u003e\n\n\u003cp style=\"margin: 0 0 16px;\"\u003e\n  The internal lateral holder assembly is a critical part of the filter underdrain system. It supports the lower internal structure that directs water through the sand media and back into the pool system. When this assembly is damaged, worn, or mismatched, it can lead to internal fitment problems, poor circulation through the media bed, or service issues during reassembly.\n\u003c\/p\u003e\n\n\u003cp style=\"margin: 0 0 22px;\"\u003e\n  Replacing a damaged OEM assembly with the correct Hayward part helps maintain proper alignment and restore the intended internal configuration of the filter.\n\u003c\/p\u003e\n\n\u003ch3 style=\"color: #087f8c; margin: 0 0 10px; font-size: 21px;\"\u003e\n  When Should the SX311MAS Be Replaced?\n\u003c\/h3\u003e\n\n\u003cul style=\"margin: 0 0 22px; padding-left: 22px;\"\u003e\n  \u003cli\u003eThe original lower assembly is cracked, broken, or warped\u003c\/li\u003e\n  \u003cli\u003eThe bottom elbow or vertical pipe is damaged\u003c\/li\u003e\n  \u003cli\u003eThe internal assembly no longer aligns or seats correctly\u003c\/li\u003e\n  \u003cli\u003eYou are rebuilding the lower internal section of an S311SX sand filter\u003c\/li\u003e\n  \u003cli\u003eThe original assembly has become brittle from age, chemical exposure, or service wear\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cdiv style=\"background-color: #fff8e8; border-left: 5px solid #d9a321; padding: 16px 18px; margin: 0 0 22px;\"\u003e\n  \u003cstrong\u003eImportant:\u003c\/strong\u003e\u003cbr\u003e\n  This listing is for the \u003cstrong\u003eSX311MAS assembly only\u003c\/strong\u003e. The \u003cstrong\u003eribbed laterals are sold separately\u003c\/strong\u003e. If your laterals are damaged as well, you may need additional replacement parts to complete the repair.\n\u003c\/div\u003e\n\n\u003ch3 style=\"color: #087f8c; margin: 0 0 10px; font-size: 21px;\"\u003e\n  Frequently Asked Questions\n\u003c\/h3\u003e\n\n\u003cp style=\"margin: 0 0 8px;\"\u003e\n  \u003cstrong\u003eDoes the Hayward SX311MAS include the elbow?\u003c\/strong\u003e\n\u003c\/p\u003e\n\u003cp style=\"margin: 0 0 16px;\"\u003e\n  Yes. Hayward identifies the SX311MAS as the lateral holder assembly with the \u003cstrong\u003ebottom vertical pipe and bottom elbow assembly\u003c\/strong\u003e.\n\u003c\/p\u003e\n\n\u003cp style=\"margin: 0 0 8px;\"\u003e\n  \u003cstrong\u003eDoes this include the laterals?\u003c\/strong\u003e\n\u003c\/p\u003e\n\u003cp style=\"margin: 0 0 16px;\"\u003e\n  No. The ribbed laterals are listed separately in the Hayward parts diagram. If those are cracked or worn, they must be purchased separately.\n\u003c\/p\u003e\n\n\u003cp style=\"margin: 0 0 8px;\"\u003e\n  \u003cstrong\u003eWill this fit every Hayward ProSeries sand filter?\u003c\/strong\u003e\n\u003c\/p\u003e\n\u003cp style=\"margin: 0 0 22px;\"\u003e\n  No. The SX311MAS is intended for the \u003cstrong\u003eS311SX\u003c\/strong\u003e. Other ProSeries models use different internal assemblies, so it is important to verify the exact filter model before ordering.\n\u003c\/p\u003e\n\n\u003cdiv style=\"border: 1px solid #b8d8dd; border-radius: 8px; padding: 16px 18px; background-color: #f8fcfd;\"\u003e\n  \u003cstrong style=\"color: #075d67;\"\u003eNeed help confirming fitment?\u003c\/strong\u003e\u003cbr\u003e\n  Send Aqua Terra Backyard your filter model number and a photo of the label on the tank. We can help confirm whether the \u003cstrong\u003eHayward SX311MAS\u003c\/strong\u003e is the correct internal assembly for your sand filter.\n\u003c\/div\u003e\n\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n","brand":"Hayward","offers":[{"title":"Default Title","offer_id":52358191055122,"sku":"SX311MAS","price":149.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/2279\/1186\/files\/SX311MAS.jpg?v=1780965316","url":"https:\/\/www.aquaterrabackyard.com\/products\/hayward-sx311mas-lateral-holder-assembly-elbow-included","provider":"Aqua Terra Backyard","version":"1.0","type":"link"}