Water Heater Magnesium Anode Rod

Water Heater Magnesium Anode Rod

Key Features

• Material: Solid Magnesium (AZ63 Alloy)
• Function: Sacrificial rod protects steel water heater tanks from corrosion
• Thread Size: 3/4 inch NPT male pipe thread
• Rod Diameter: 0.84 inches
• Rod Length: 32 inches
• Required Socket Size: 1 1/16 inch hex head

Replaces / Cross-Reference Part Numbers

• Substitutes for standard OEM magnesium anode rods in most residential water heaters.
• Direct replacement for part numbers such as 239-43654-00, 100108511, and 9003820.

Compatibility & Fitment

• Fits most standard residential gas and electric water heaters from 40 to 89 gallons.
• Compatible with major brands including A.O. Smith, Bradford White, Rheem, American, GE, Richmond, and State.
• Connects to the standard 3/4 inch NPT anode rod port on top of the water heater.

When to Replace

• Inspect annually and replace every 3-5 years, or more frequently in areas with hard water.
• Replace immediately if the steel core wire is visible.
• Replace when the rod is less than 1/2 inch thick or is heavily pitted and corroded.
• Note: If a sulfur or "rotten egg" smell is present in hot water, an aluminum or zinc-aluminum rod may be a more suitable alternative.

Installation Tips

• Turn off the power (or gas) and cold water supply to the heater.
• Slightly open a hot water faucet to relieve pressure, then drain several gallons from the tank.
• Use a 1 1/16 inch socket with a breaker bar or impact wrench to remove the old anode rod.
• Flush any sediment from the tank before installing the new rod.
• Apply PTFE thread seal tape to the new rod's threads for a watertight seal.
• Install the new rod, tighten securely, restore water and power, and check for leaks.