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.