{"product_id":"haywardhseriesheaternaturalgasvalve150400mvhaxgsv0001hpphaxgsv0001","title":"Hayward H-Series Heater Natural Gas Valve 150-400 MV | HAXGSV0001","description":"\u003cdiv class=\"product-description\"\u003e\n\n  \u003ch2\u003eHayward HAXGSV0001 Millivolt Natural Gas Valve (MV) — H-Series 150–400 (ED1 Style)\u003c\/h2\u003e\n\n  \u003cp\u003e\n    The Hayward \u003cstrong\u003eHAXGSV0001\u003c\/strong\u003e is a genuine OEM \u003cstrong\u003emillivolt (MV) natural gas valve\u003c\/strong\u003e used on select Hayward\n    \u003cstrong\u003eH-Series\u003c\/strong\u003e pool heaters. This valve regulates the flow of \u003cstrong\u003enatural gas\u003c\/strong\u003e to the burner system. It is the correct\n    style for \u003cstrong\u003emillivolt\u003c\/strong\u003e heaters (powered by a thermopile\/thermal generator), not electronic dual-stage systems.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eFits \/ Compatibility\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eHayward \u003cstrong\u003eH-Series Millivolt (MV)\u003c\/strong\u003e heaters in the \u003cstrong\u003e150,000–400,000 BTU\u003c\/strong\u003e range\u003c\/li\u003e\n    \u003cli\u003eCommonly listed for \u003cstrong\u003eED1-style\u003c\/strong\u003e heater models, including:\n      \u003cstrong\u003eH150ED1\u003c\/strong\u003e, \u003cstrong\u003eH200ED1\u003c\/strong\u003e, \u003cstrong\u003eH250ED1\u003c\/strong\u003e, \u003cstrong\u003eH300ED1\u003c\/strong\u003e, \u003cstrong\u003eH350ED1\u003c\/strong\u003e, \u003cstrong\u003eH400ED1\u003c\/strong\u003e\n    \u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003cp\u003e\n    \u003cstrong\u003eFit tip:\u003c\/strong\u003e Confirm your heater is a \u003cstrong\u003emillivolt (MV)\u003c\/strong\u003e model and uses \u003cstrong\u003enatural gas\u003c\/strong\u003e (not propane).\n    Gas valves are not interchangeable between fuel types or between MV vs electronic\/dual-stage heater configurations.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eWhat It Does\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eControls and regulates \u003cstrong\u003enatural gas flow\u003c\/strong\u003e to the burner system\u003c\/li\u003e\n    \u003cli\u003eWorks with the heater’s \u003cstrong\u003emillivolt safety circuit\u003c\/strong\u003e (thermopile-powered systems)\u003c\/li\u003e\n    \u003cli\u003eHelps maintain stable heater operation when the correct gas supply and manifold settings are present\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eCommon Reasons to Replace\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eHeater will not light or will not stay running after troubleshooting confirms proper water flow and ignition components\u003c\/li\u003e\n    \u003cli\u003eIntermittent shutdowns linked to a failing valve (after verifying thermopile output and wiring integrity)\u003c\/li\u003e\n    \u003cli\u003eGas valve is leaking, sticking, or has damaged terminals\/valve body\u003c\/li\u003e\n    \u003cli\u003eValve failure discovered during heater service or refurbishment\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eWhat’s Included\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e1 OEM \u003cstrong\u003eHAXGSV0001\u003c\/strong\u003e millivolt natural gas valve\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eImportant Installation Notes\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\u003cstrong\u003eGas components should be serviced by a qualified technician.\u003c\/strong\u003e\u003c\/li\u003e\n    \u003cli\u003eAfter installation, the system must be \u003cstrong\u003eleak tested\u003c\/strong\u003e and verified for correct operation.\u003c\/li\u003e\n    \u003cli\u003eConfirm proper \u003cstrong\u003egas supply type\u003c\/strong\u003e (Natural Gas), \u003cstrong\u003einlet pressure\u003c\/strong\u003e, and heater model compatibility before ordering.\u003c\/li\u003e\n    \u003cli\u003eIf a new valve doesn’t resolve ignition issues, verify the \u003cstrong\u003ethermopile output\u003c\/strong\u003e, safety switches, wiring, and gas supply before further parts replacement.\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=HAXGSV0001\"\u003eHayward HAXGSV0001 Gas Valve (search)\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=hayward%20h-series%20thermopile\"\u003eHayward H-Series Thermopiles \/ Generators (search)\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=hayward%20h-series%20pilot\"\u003eHayward H-Series Pilot \u0026amp; Ignition Parts (search)\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=HAXPSA1930\"\u003eHayward HAXPSA1930 Pressure Switch Assembly (search)\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=hayward%20h-series%20heater%20parts\"\u003eHayward H-Series Heater Parts (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\u003eKeep the heater area clear for proper airflow and safe operation.\u003c\/li\u003e\n    \u003cli\u003eMaintain proper water flow (clean filter and baskets) to avoid nuisance shutdowns that can look like a gas\/ignition problem.\u003c\/li\u003e\n    \u003cli\u003eIf ignition becomes inconsistent, verify gas supply, thermopile output, and safety switch operation before replacing major components.\u003c\/li\u003e\n    \u003cli\u003eMaintain balanced water chemistry to reduce scaling inside the heater and extend overall heater life.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n\u003c\/div\u003e","brand":"Hayward","offers":[{"title":"Default Title","offer_id":46797879935151,"sku":"HAXGSV0001","price":469.99,"currency_code":"USD","in_stock":true}],"url":"https:\/\/freshized.com\/products\/haywardhseriesheaternaturalgasvalve150400mvhaxgsv0001hpphaxgsv0001","provider":"Freshized","version":"1.0","type":"link"}