{"product_id":"hayward-sx311cd2fws-bottom-elbow-assembly","title":"Hayward SX311CD2FWS Bottom Elbow Assembly","description":"\u003cdiv style=\"font-family: Arial, Helvetica, sans-serif; color: #111111; line-height: 1.65; max-width: 1000px; margin: 0 auto;\"\u003e\n\n  \u003cdiv style=\"background: linear-gradient(135deg, #198278 0%, #21d9c9 100%); color: #ffffff; padding: 30px 28px; border-radius: 12px; margin-bottom: 24px;\"\u003e\n    \u003cdiv style=\"font-size: 13px; font-weight: 700; letter-spacing: 1.5px; text-transform: uppercase; margin-bottom: 8px;\"\u003e\n      Genuine Hayward Replacement Part\n    \u003c\/div\u003e\n    \u003ch2 style=\"font-size: 28px; line-height: 1.25; margin: 0 0 10px; color: #ffffff;\"\u003e\n      Hayward SX311CD2FWS Bottom Elbow Assembly for S311SX and S311SXV Sand Filters\n    \u003c\/h2\u003e\n    \u003cp style=\"font-size: 16px; margin: 0; color: #ffffff;\"\u003e\n      Restore the lower internal flow path of a compatible Hayward ProSeries high-rate sand filter with the model-specific SX311CD2FWS bottom elbow assembly.\n    \u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv style=\"background: #f7f9f9; border-left: 5px solid #e37c3f; padding: 20px 22px; border-radius: 8px; margin-bottom: 24px;\"\u003e\n    \u003cp style=\"margin: 0; font-size: 16px;\"\u003e\n      \u003cstrong\u003eImportant compatibility note:\u003c\/strong\u003e This part is designed for the Hayward \u003cstrong\u003eS311SX and S311SXV\u003c\/strong\u003e filter family. It is not the same as the \u003cstrong\u003eSX310CD2FWS\u003c\/strong\u003e elbow used with the S310S filter. Verify the complete filter model number before ordering.\n    \u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003ch3 style=\"font-size: 22px; color: #198278; border-bottom: 2px solid #21d9c9; padding-bottom: 8px; margin: 28px 0 16px;\"\u003e\n    Product Overview\n  \u003c\/h3\u003e\n\n  \u003cp style=\"margin: 0 0 16px;\"\u003e\n    The \u003cstrong\u003eHayward SX311CD2FWS\u003c\/strong\u003e is the bottom elbow assembly specified for compatible Hayward S311 ProSeries side-mount sand filters. This internal component connects with the lower vertical-pipe and lateral-holder system to direct water through the filter’s underdrain assembly during filtration and backwashing.\n  \u003c\/p\u003e\n\n  \u003cp style=\"margin: 0 0 20px;\"\u003e\n    A damaged, cracked, worn, or improperly fitting internal elbow can contribute to poor circulation, sand returning to the pool, internal leakage, or ineffective filtration. Replacing the correct model-specific assembly helps restore the intended internal water path without replacing the complete filter tank.\n  \u003c\/p\u003e\n\n  \u003cdiv style=\"display: flex; flex-wrap: wrap; gap: 14px; margin: 24px 0;\"\u003e\n    \u003cdiv style=\"flex: 1 1 220px; background: #ffffff; border: 1px solid #dfe7e6; border-radius: 10px; padding: 18px;\"\u003e\n      \u003cdiv style=\"font-size: 22px; margin-bottom: 6px;\"\u003e✓\u003c\/div\u003e\n      \u003cstrong style=\"color: #198278;\"\u003eModel-Specific Fit\u003c\/strong\u003e\n      \u003cp style=\"margin: 6px 0 0; font-size: 14px;\"\u003eDesigned for compatible Hayward S311SX and S311SXV sand filters.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv style=\"flex: 1 1 220px; background: #ffffff; border: 1px solid #dfe7e6; border-radius: 10px; padding: 18px;\"\u003e\n      \u003cdiv style=\"font-size: 22px; margin-bottom: 6px;\"\u003e✓\u003c\/div\u003e\n      \u003cstrong style=\"color: #198278;\"\u003eGenuine Hayward Part\u003c\/strong\u003e\n      \u003cp style=\"margin: 6px 0 0; font-size: 14px;\"\u003eManufactured as a Hayward service replacement for the specified filter assembly.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv style=\"flex: 1 1 220px; background: #ffffff; border: 1px solid #dfe7e6; border-radius: 10px; padding: 18px;\"\u003e\n      \u003cdiv style=\"font-size: 22px; margin-bottom: 6px;\"\u003e✓\u003c\/div\u003e\n      \u003cstrong style=\"color: #198278;\"\u003eInternal Flow Component\u003c\/strong\u003e\n      \u003cp style=\"margin: 6px 0 0; font-size: 14px;\"\u003eConnects with the lower internal plumbing and underdrain system.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003ch3 style=\"font-size: 22px; color: #198278; border-bottom: 2px solid #21d9c9; padding-bottom: 8px; margin: 28px 0 16px;\"\u003e\n    Key Features\n  \u003c\/h3\u003e\n\n  \u003cul style=\"margin: 0 0 24px; padding-left: 22px;\"\u003e\n    \u003cli style=\"margin-bottom: 9px;\"\u003eGenuine Hayward replacement bottom elbow assembly\u003c\/li\u003e\n    \u003cli style=\"margin-bottom: 9px;\"\u003eManufacturer part number: \u003cstrong\u003eSX311CD2FWS\u003c\/strong\u003e\n\u003c\/li\u003e\n    \u003cli style=\"margin-bottom: 9px;\"\u003eSpecified for compatible S311SX and S311SXV ProSeries sand filters\u003c\/li\u003e\n    \u003cli style=\"margin-bottom: 9px;\"\u003eSupports the filter’s lower internal water-flow path\u003c\/li\u003e\n    \u003cli style=\"margin-bottom: 9px;\"\u003eUseful when repairing damaged or worn internal plumbing\u003c\/li\u003e\n    \u003cli style=\"margin-bottom: 9px;\"\u003eModel-specific design helps maintain proper alignment inside the filter tank\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3 style=\"font-size: 22px; color: #198278; border-bottom: 2px solid #21d9c9; padding-bottom: 8px; margin: 28px 0 16px;\"\u003e\n    Product Specifications\n  \u003c\/h3\u003e\n\n  \u003cdiv style=\"overflow-x: auto; margin-bottom: 26px;\"\u003e\n    \u003ctable style=\"width: 100%; border-collapse: collapse; min-width: 560px;\"\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n          \u003ctd style=\"width: 34%; background: #eef7f6; border: 1px solid #d4e3e1; padding: 12px; font-weight: 700;\"\u003eBrand\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #d4e3e1; padding: 12px;\"\u003eHayward\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd style=\"background: #eef7f6; border: 1px solid #d4e3e1; padding: 12px; font-weight: 700;\"\u003ePart Number\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #d4e3e1; padding: 12px;\"\u003eSX311CD2FWS\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd style=\"background: #eef7f6; border: 1px solid #d4e3e1; padding: 12px; font-weight: 700;\"\u003eProduct Type\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #d4e3e1; padding: 12px;\"\u003eSand-filter bottom elbow assembly\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd style=\"background: #eef7f6; border: 1px solid #d4e3e1; padding: 12px; font-weight: 700;\"\u003eCompatible Filter Family\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #d4e3e1; padding: 12px;\"\u003eHayward ProSeries S311\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd style=\"background: #eef7f6; border: 1px solid #d4e3e1; padding: 12px; font-weight: 700;\"\u003eCompatible Models\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #d4e3e1; padding: 12px;\"\u003eS311SX and S311SXV\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd style=\"background: #eef7f6; border: 1px solid #d4e3e1; padding: 12px; font-weight: 700;\"\u003eInstallation Location\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #d4e3e1; padding: 12px;\"\u003eLower internal filter assembly\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd style=\"background: #eef7f6; border: 1px solid #d4e3e1; padding: 12px; font-weight: 700;\"\u003eCondition\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #d4e3e1; padding: 12px;\"\u003eNew replacement part\u003c\/td\u003e\n        \u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\n  \u003ch3 style=\"font-size: 22px; color: #198278; border-bottom: 2px solid #21d9c9; padding-bottom: 8px; margin: 28px 0 16px;\"\u003e\n    Compatibility\n  \u003c\/h3\u003e\n\n  \u003cdiv style=\"background: #ffffff; border: 1px solid #d9e4e3; border-radius: 10px; padding: 20px; margin-bottom: 22px;\"\u003e\n    \u003cp style=\"margin: 0 0 10px;\"\u003e\u003cstrong\u003eDesigned for:\u003c\/strong\u003e\u003c\/p\u003e\n    \u003cul style=\"margin: 0; padding-left: 22px;\"\u003e\n      \u003cli style=\"margin-bottom: 8px;\"\u003eHayward S311SX ProSeries high-rate sand filter\u003c\/li\u003e\n      \u003cli\u003eHayward S311SXV ProSeries high-rate sand filter\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv style=\"background: #fff5ef; border: 1px solid #f0c5aa; border-radius: 10px; padding: 20px; margin-bottom: 24px;\"\u003e\n    \u003cp style=\"margin: 0 0 8px;\"\u003e\u003cstrong style=\"color: #af5b31;\"\u003eDo not substitute based only on filter diameter.\u003c\/strong\u003e\u003c\/p\u003e\n    \u003cp style=\"margin: 0;\"\u003e\n      The \u003cstrong\u003eSX310CD2FWS\u003c\/strong\u003e is associated with the S310S filter configuration and should not be assumed interchangeable with the \u003cstrong\u003eSX311CD2FWS\u003c\/strong\u003e. Internal plumbing dimensions and connection geometry can differ between filter families.\n    \u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003ch3 style=\"font-size: 22px; color: #198278; border-bottom: 2px solid #21d9c9; padding-bottom: 8px; margin: 28px 0 16px;\"\u003e\n    What Is Included?\n  \u003c\/h3\u003e\n\n  \u003cp style=\"margin: 0 0 12px;\"\u003e\n    This listing is for:\n  \u003c\/p\u003e\n\n  \u003cul style=\"margin: 0 0 20px; padding-left: 22px;\"\u003e\n    \u003cli\u003e\u003cstrong\u003eOne Hayward SX311CD2FWS bottom elbow assembly\u003c\/strong\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003cp style=\"margin: 0 0 22px; font-size: 14px; color: #4b5554;\"\u003e\n    The lateral-holder assembly and other filter components are not included unless specifically shown and stated as included in the selected product configuration. For a combined S311 lower-internal replacement, Hayward identifies the SX311MAS assembly separately.\n  \u003c\/p\u003e\n\n  \u003ch3 style=\"font-size: 22px; color: #198278; border-bottom: 2px solid #21d9c9; padding-bottom: 8px; margin: 28px 0 16px;\"\u003e\n    Installation Notes\n  \u003c\/h3\u003e\n\n  \u003cdiv style=\"background: #f7f9f9; border-radius: 10px; padding: 20px; margin-bottom: 24px;\"\u003e\n    \u003cul style=\"margin: 0; padding-left: 22px;\"\u003e\n      \u003cli style=\"margin-bottom: 10px;\"\u003eShut off the circulation pump and disconnect power before servicing the filter.\u003c\/li\u003e\n      \u003cli style=\"margin-bottom: 10px;\"\u003eOpen the manual air-relief valve and fully relieve system pressure.\u003c\/li\u003e\n      \u003cli style=\"margin-bottom: 10px;\"\u003eDrain the filter tank before removing internal components.\u003c\/li\u003e\n      \u003cli style=\"margin-bottom: 10px;\"\u003eInspect the lateral holder, vertical pipe, seals, and connecting surfaces while the filter is open.\u003c\/li\u003e\n      \u003cli style=\"margin-bottom: 10px;\"\u003eConfirm that all internal parts are seated and aligned before adding filter sand.\u003c\/li\u003e\n      \u003cli\u003eProfessional installation is recommended when the filter’s internal configuration or condition is uncertain.\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv style=\"background: #fff1ed; border-left: 5px solid #e37c3f; padding: 20px 22px; border-radius: 8px; margin-bottom: 26px;\"\u003e\n    \u003cstrong\u003ePressure safety warning:\u003c\/strong\u003e\n    Never loosen the filter clamp, valve, fittings, or internal components while the system is operating or pressurized. Turn off the pump, disconnect power, open the air-relief valve, and confirm that pressure has been fully released before service.\n  \u003c\/div\u003e\n\n  \u003ch3 style=\"font-size: 22px; color: #198278; border-bottom: 2px solid #21d9c9; padding-bottom: 8px; margin: 28px 0 16px;\"\u003e\n    Frequently Asked Questions\n  \u003c\/h3\u003e\n\n  \u003cdetails style=\"border: 1px solid #d8e3e1; border-radius: 8px; margin-bottom: 10px; background: #ffffff;\"\u003e\n    \u003csummary style=\"cursor: pointer; padding: 15px 18px; font-weight: 700; color: #198278;\"\u003e\n      What filters use the Hayward SX311CD2FWS?\n    \u003c\/summary\u003e\n    \u003cdiv style=\"padding: 0 18px 16px;\"\u003e\n      \u003cp style=\"margin: 0;\"\u003e\n        Hayward identifies the SX311CD2FWS as the bottom elbow assembly for the S311 filter family, including compatible S311SX and S311SXV ProSeries sand filters.\n      \u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails style=\"border: 1px solid #d8e3e1; border-radius: 8px; margin-bottom: 10px; background: #ffffff;\"\u003e\n    \u003csummary style=\"cursor: pointer; padding: 15px 18px; font-weight: 700; color: #198278;\"\u003e\n      Is SX311CD2FWS interchangeable with SX310CD2FWS?\n    \u003c\/summary\u003e\n    \u003cdiv style=\"padding: 0 18px 16px;\"\u003e\n      \u003cp style=\"margin: 0;\"\u003e\n        No interchangeability should be assumed. The SX311CD2FWS is specified for the S311 filter configuration, while the SX310CD2FWS is associated with the S310S. Always match the replacement part to the complete model number printed on the filter label.\n      \u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails style=\"border: 1px solid #d8e3e1; border-radius: 8px; margin-bottom: 10px; background: #ffffff;\"\u003e\n    \u003csummary style=\"cursor: pointer; padding: 15px 18px; font-weight: 700; color: #198278;\"\u003e\n      Does this include the lateral-holder assembly?\n    \u003c\/summary\u003e\n    \u003cdiv style=\"padding: 0 18px 16px;\"\u003e\n      \u003cp style=\"margin: 0;\"\u003e\n        This part number identifies the bottom elbow assembly. Hayward lists the SX311DAS lateral-holder assembly with bottom vertical pipe separately. The combined lower assembly is identified as SX311MAS.\n      \u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails style=\"border: 1px solid #d8e3e1; border-radius: 8px; margin-bottom: 10px; background: #ffffff;\"\u003e\n    \u003csummary style=\"cursor: pointer; padding: 15px 18px; font-weight: 700; color: #198278;\"\u003e\n      Will this fit an older S311SX filter?\n    \u003c\/summary\u003e\n    \u003cdiv style=\"padding: 0 18px 16px;\"\u003e\n      \u003cp style=\"margin: 0;\"\u003e\n        It is the current Hayward service part listed for the S311SX filter family. Because older filters may have undergone previous repairs or component changes, verify the tank model label and compare the existing internal configuration before installation.\n      \u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails style=\"border: 1px solid #d8e3e1; border-radius: 8px; margin-bottom: 24px; background: #ffffff;\"\u003e\n    \u003csummary style=\"cursor: pointer; padding: 15px 18px; font-weight: 700; color: #198278;\"\u003e\n      When should the bottom elbow assembly be replaced?\n    \u003c\/summary\u003e\n    \u003cdiv style=\"padding: 0 18px 16px;\"\u003e\n      \u003cp style=\"margin: 0;\"\u003e\n        Replacement may be appropriate when the elbow is cracked, distorted, leaking internally, no longer seating correctly, or damaged during filter disassembly. The surrounding vertical pipe, holder, laterals, and seals should also be inspected.\n      \u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdiv style=\"background: #111111; color: #ffffff; padding: 24px; border-radius: 10px; text-align: center;\"\u003e\n    \u003ch3 style=\"margin: 0 0 8px; color: #ffffff; font-size: 21px;\"\u003e\n      Confirm Your Filter Model Before Ordering\n    \u003c\/h3\u003e\n    \u003cp style=\"margin: 0; color: #ffffff;\"\u003e\n      Locate the model label on the filter tank and confirm that it reads S311SX or S311SXV. Matching the complete model number is the best way to avoid ordering an incorrect internal elbow assembly.\n    \u003c\/p\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Hayward","offers":[{"title":"Default Title","offer_id":52519978991890,"sku":"SX311CD2FWS","price":96.71,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/2279\/1186\/files\/Screenshot_2026-07-15_135124.jpg?v=1784137905","url":"https:\/\/www.aquaterrabackyard.com\/products\/hayward-sx311cd2fws-bottom-elbow-assembly","provider":"Aqua Terra Backyard","version":"1.0","type":"link"}