Anode Rod, Magnesium, Hex Plug, 3/4" x 14" – AO Smith | NBK-20964

NBK-20964 – Anode Rod, Magnesium, Hex Plug, 3/4" x 14" – AO Smith Equivalent The NBK-20964 Anode Rod is a magnesium hex plug-style rod measuring 3/4" x 14", designed to protect residential water heaters from rust and corrosion. Fully equivalent to AO Smith part numbers 100111374 and 548209, this high-quality replacement provides exceptional protection and performance—ideal for systems using soft or neutral water. Key Features • Magnesium Protection – Provides superior cathodic protection by attracting corrosive ions before they reach the tank lining • Compact Size – Perfect for tight or low-clearance installations • Hex Plug Design – Installs easily using a standard socket wrench • Long-Lasting Performance – Durable magnesium construction ensures maximum corrosion resistance • OEM-Compatible Replacement – Matches AO Smith 100111374 and 548209 specifications Specifications • SKU: 20964 • Category: Water Heater Parts / Anode Rods • Material: Magnesium • Type: Hex Plug • Dimensions: 3/4" Diameter x 14" Length • OEM Brand: AO Smith • Replaces OEM Parts: 100111374, 548209 • Compatibility: Fits select AO Smith and compatible residential water heaters Equivalent To AO Smith: 100111374 548209 Why Choose the NBK-20964? Protect your water heater investment with the NBK-20964 Magnesium Anode Rod. Its compact, hex plug design allows easy installation in tight spaces, while the magnesium construction offers strong corrosion resistance—especially effective in soft water environments. A simple, cost-effective way to extend the lifespan and performance of your AO Smith water heater. Shipping & Availability Special order item from NBK. Please allow 1–2 business days for processing before shipment.