{"product_id":"21027","title":"Magnesium Anode Rod 3\/4” x 42” Hex Plug – Rheem AP12938 – NBK-21027","description":"\u003ch2\u003eMagnesium Anode Rod 3\/4” Hex Plug 3\/4” x 42” – NBK-21027\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eNBK-21027 Magnesium Anode Rod\u003c\/strong\u003e is a critical corrosion-protection component designed for outdoor boilers and water heater systems. Anode rods help extend tank life by attracting corrosive elements in the water, reducing rust and deterioration inside the tank.\u003c\/p\u003e\n\u003cp\u003eThis unit features a \u003cstrong\u003e3\/4” hex plug\u003c\/strong\u003e and measures \u003cstrong\u003e3\/4” x 42 inches\u003c\/strong\u003e, making it a direct replacement for \u003cstrong\u003eRheem AP12938\u003c\/strong\u003e and compatible equivalents such as Grainger models.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMagnesium Construction:\u003c\/strong\u003e Provides superior corrosion protection in water systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3\/4” Hex Plug Fit:\u003c\/strong\u003e Standard connection for many boiler and heater tanks\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e42” Length:\u003c\/strong\u003e Designed for full tank coverage and extended service life\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM-Compatible Replacement:\u003c\/strong\u003e Direct replacement for Rheem AP12938\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSKU:\u003c\/strong\u003e 21027\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Outdoor Boiler\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Brand:\u003c\/strong\u003e Rheem\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Magnesium\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlug Type:\u003c\/strong\u003e 3\/4” Hex Plug\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRod Size:\u003c\/strong\u003e 3\/4” Diameter x 42” Length\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplaces OEM:\u003c\/strong\u003e AP12938\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eEquivalent To\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRheem:\u003c\/strong\u003e AP12938\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrainger:\u003c\/strong\u003e 45W630\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhy Choose the NBK-21027?\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eNBK-21027\u003c\/strong\u003e magnesium anode rod is an essential maintenance part for protecting outdoor boiler and water heater tanks from corrosion. Replacing worn anodes helps prevent premature tank failure and supports long-term system performance.\u003c\/p\u003e\n\u003ch3\u003eInstallation Tips\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eTurn off water heater or boiler and allow system to cool before servicing.\u003c\/li\u003e\n\u003cli\u003eRelieve tank pressure before removing the existing anode rod.\u003c\/li\u003e\n\u003cli\u003eUse thread sealant or plumber’s tape for proper installation.\u003c\/li\u003e\n\u003cli\u003eInspect anode condition annually for best tank protection.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003ePairs Well With\u003c\/h3\u003e\n\u003cp\u003eOutdoor Boiler Treatment Chemicals, Replacement Gaskets, Water Heater Drain Valves, Tank Maintenance Kits\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSPECIAL ORDER NOTICE:\u003c\/strong\u003e This item is sourced through our special order program. Please allow 1–2 business days for processing prior to shipment.\u003c\/p\u003e","brand":"Rheem","offers":[{"title":"Default Title","offer_id":52401228513648,"sku":"6-NBK-234","price":32.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0595\/4463\/3444\/files\/21027-AP12938-scaled.webp?v=1770855500","url":"https:\/\/total-hearth.com\/products\/21027","provider":"Total Hearth","version":"1.0","type":"link"}