{"product_id":"honeywell-reliance-wt8840b-gas-control-valve-1-inch-immersion-well-160-f-for-ao-smith-water-heaters","title":"Honeywell Reliance WT8840B Gas Control Valve — 1-inch Immersion-Well, 160°F, for AO Smith Water Heaters","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eThe Honeywell Reliance WT8840B gas control valve is designed as a durable, trade-ready replacement for WV8840 valves on AO Smith water heaters. Built for standing-pilot installations, it relies on an immersion-well temperature-sensing approach to help regulate water temperature with steady, predictable control.\u003c\/p\u003e\n\u003cp\u003eCrafted in the United States by Honeywell, this valve aligns with established heating systems and is intended to fit a 1-inch cavity profile. It is specified to operate in ambient conditions from 0°C to 60°C, offering compatibility across a range of installation environments and climates.\u003c\/p\u003e\n\n\u003ch3\u003eKey features at a glance\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eReplacement compatibility with WV8840 valves and AO Smith water heaters\u003c\/li\u003e\n  \u003cli\u003eStanding-pilot compatible design for reliable ignition and steady operation\u003c\/li\u003e\n  \u003cli\u003eImmersion-well sensing for responsive temperature regulation\u003c\/li\u003e\n  \u003cli\u003eMade in the United States by Honeywell\u003c\/li\u003e\n  \u003cli\u003e1-inch cavity specification for fit and retrofit projects\u003c\/li\u003e\n  \u003cli\u003eAmbient operating range: 0°C to 60°C (32°F to 140°F)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eReal-world use cases\u003c\/h3\u003e\n\u003cp\u003eOn service calls where aging or malfunctioning WV8840 valves affect hot water consistency, technicians can consider a WT8840B as a practical replacement path. The immersion-well sensor enables the control valve to react to water temperature changes without extensive rewiring, helping restore steady heated water flow in standing-pilot systems.\u003c\/p\u003e\n\u003cp\u003eVisualize a commercial or multi-residential setup where downtime matters: a ready-to-install WT8840B valve may shorten repair time while preserving the established fuel-control logic. Because the unit is designed for standing-pilot operation, it suits installations that rely on that ignition method.\u003c\/p\u003e\n\n\u003ch3\u003eQuality and integration\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eUnited States-based manufacturing with Honeywell engineering standards\u003c\/li\u003e\n  \u003cli\u003eDesigned for AO Smith water heaters to ensure compatibility and reliable performance\u003c\/li\u003e\n  \u003cli\u003eIdeal for technicians performing routine maintenance or upgrades on gas-fired systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eNote: This valve is a component for trained professionals. Always follow official guidelines when replacing a gas control valve and ensure safe operation of gas appliances.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What is the WT8840B valve used for?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: A trade-use gas control valve replacement for WV8840 on AO Smith water heaters, using immersion-well sensing for temperature control.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What are the temperature and installation notes?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Operates in standing-pilot systems with an immersion well; ambient range 0°C to 60°C; manufactured in the United States by Honeywell.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Honeywell","offers":[{"title":"Default Title","offer_id":53089543094383,"sku":"B06XNSV2BG","price":241.29,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/0598\/3087\/files\/honeywell-reliance-water-heater-valve-wt8840b-exterior.jpg?v=1778691689","url":"https:\/\/taskholt.com\/products\/honeywell-reliance-wt8840b-gas-control-valve-1-inch-immersion-well-160-f-for-ao-smith-water-heaters","provider":"TaskHolt","version":"1.0","type":"link"}