{"product_id":"haywardheatexchangerassemblyh350fdfdxlhxa1350hppfdxlhxa1350","title":"Hayward Heat Exchanger Assembly-H350FD | FDXLHXA1350","description":"\u003cdiv class=\"product-description\"\u003e\n\n  \u003ch2\u003eHayward FDXLHXA1350 Heat Exchanger Assembly for Universal H-Series Low NOx H350FD Heaters\u003c\/h2\u003e\n\n  \u003cp\u003e\n    The Hayward \u003cstrong\u003eFDXLHXA1350\u003c\/strong\u003e is a genuine OEM \u003cstrong\u003eheat exchanger assembly\u003c\/strong\u003e designed for the\n    Hayward \u003cstrong\u003eUniversal H-Series Low NOx\u003c\/strong\u003e pool heater model \u003cstrong\u003eH350FD\u003c\/strong\u003e. This is the primary water-to-flame heat transfer\n    component inside the heater. It’s typically replaced when the existing exchanger is leaking, restricted by scale\/debris, or damaged from\n    freeze events, corrosive water chemistry, or long-term wear.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eFits \/ Compatibility\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eHayward \u003cstrong\u003eUniversal H-Series Low NOx\u003c\/strong\u003e heater model: \u003cstrong\u003eH350FD\u003c\/strong\u003e\n\u003c\/li\u003e\n    \u003cli\u003ePlumbing connection style commonly listed as \u003cstrong\u003e2\" x 2-1\/2\" CPVC union\u003c\/strong\u003e connections (heater-side union\/header interface)\u003c\/li\u003e\n    \u003cli\u003eDesigned as a direct OEM replacement where \u003cstrong\u003eFDXLHXA1350\u003c\/strong\u003e is specified on the parts diagram\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eCommon Reasons to Replace the Heat Exchanger\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eWater leaking\u003c\/strong\u003e from inside the heater cabinet (especially during circulation or heating)\u003c\/li\u003e\n    \u003cli\u003eReduced heater performance due to \u003cstrong\u003escale buildup\u003c\/strong\u003e or internal restriction\u003c\/li\u003e\n    \u003cli\u003eExchanger damage from \u003cstrong\u003efreeze\u003c\/strong\u003e conditions\u003c\/li\u003e\n    \u003cli\u003eCorrosion or pitting from \u003cstrong\u003eaggressive water chemistry\u003c\/strong\u003e or improper balance\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eWhat’s Included\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e(1) Complete \u003cstrong\u003eheat exchanger assembly\u003c\/strong\u003e (FDXLHXA1350)\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eSpecs (Quick Reference)\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003ePart Number: \u003cstrong\u003eFDXLHXA1350\u003c\/strong\u003e\n\u003c\/li\u003e\n    \u003cli\u003eApplication: \u003cstrong\u003eHeat Exchanger Assembly\u003c\/strong\u003e\n\u003c\/li\u003e\n    \u003cli\u003eHeater Model: \u003cstrong\u003eH350FD\u003c\/strong\u003e (Universal H-Series Low NOx)\u003c\/li\u003e\n    \u003cli\u003eUPC: \u003cstrong\u003e610377073745\u003c\/strong\u003e\n\u003c\/li\u003e\n    \u003cli\u003eApprox. Weight (typical listing): \u003cstrong\u003e48.5 lb\u003c\/strong\u003e\n\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eInstallation Notes\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eQualified service recommended:\u003c\/strong\u003e replacing a heat exchanger typically involves gas heater service and internal disassembly.\u003c\/li\u003e\n    \u003cli\u003eShut off \u003cstrong\u003epower\u003c\/strong\u003e and \u003cstrong\u003egas\u003c\/strong\u003e to the heater, relieve system pressure, and allow the unit to cool before service.\u003c\/li\u003e\n    \u003cli\u003eIf the original exchanger failed due to \u003cstrong\u003escale\u003c\/strong\u003e or low flow, correct the root cause (water balance, bypass, filter condition, pump flow) to prevent repeat failure.\u003c\/li\u003e\n    \u003cli\u003eInspect\/replace any disturbed \u003cstrong\u003eO-rings, gaskets, and unions\u003c\/strong\u003e during reassembly to ensure a leak-free seal.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eRelated Products\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=FDXLHXA1350\"\u003eHayward FDXLHXA1350 (search)\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=Hayward%20H350FD%20parts\"\u003eHayward H350FD Heater Parts (search)\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=FDXLWPS1930\"\u003eHayward FD Heater Water Pressure Switch (FDXLWPS1930) (search)\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=FDXLTER1931\"\u003eHayward FD Heater Thermistor (FDXLTER1931) (search)\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=FDXLPRM1930\"\u003eHayward FD Return Manifold \/ Header Kit (FDXLPRM1930) (search)\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=heater%20union%20o-ring%20hayward%20FD\"\u003eHayward FD Heater Union O-Rings \u0026amp; Seals (search)\u003c\/a\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr\u003e\n\n  \u003ch3\u003eMaintenance Tips\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eMaintain balanced water chemistry (especially \u003cstrong\u003epH\u003c\/strong\u003e, \u003cstrong\u003ealkalinity\u003c\/strong\u003e, and \u003cstrong\u003ecalcium hardness\u003c\/strong\u003e) to reduce scaling and corrosion inside the exchanger.\u003c\/li\u003e\n    \u003cli\u003eKeep filters and pump baskets clean—\u003cstrong\u003elow flow\u003c\/strong\u003e can overheat the heater and stress internal components.\u003c\/li\u003e\n    \u003cli\u003eIf the heater is installed in a freeze-prone area, properly \u003cstrong\u003ewinterize\u003c\/strong\u003e and drain the unit to prevent exchanger cracking.\u003c\/li\u003e\n    \u003cli\u003eAddress small leaks early—mineral buildup can damage sealing surfaces and lead to larger failures.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n\u003c\/div\u003e","brand":"Hayward","offers":[{"title":"Default Title","offer_id":52589938377020,"sku":"FDXLHXA1350","price":1149.94,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0736\/3280\/9276\/files\/hayward-heat-exchanger-assembly-h350fd-fdxlhxa1350-heater-parts-5092346.jpg?v=1772790147","url":"https:\/\/aquapoolsupply.com\/products\/haywardheatexchangerassemblyh350fdfdxlhxa1350hppfdxlhxa1350","provider":"Aqua Pool Supply","version":"1.0","type":"link"}