To change the anode in a Rheem water heater, first turn off the power and water supply, then drain the tank partially, remove the anode rod using a socket wrench, and replace it with a new anode rod, ensuring a tight seal before refilling the tank and restoring power.
Replacing the anode rod in your Rheem water heater is essential to prevent corrosion and eliminate sulfur smells. This guide covers everything from locating the anode to step-by-step replacement instructions.
Why Replace Your Rheem Water Heater Anode Rod?
The anode rod sacrifices itself to protect your tank from rust. Rheem hybrid heat pump models often develop sulfur smells when the anode deteriorates. Replacement improves water quality and extends tank life.
Signs You Need a New Anode Rod
- Rotten egg smell in hot water
- Discolored or metallic-tasting water
- Visible corrosion on water connections
- Water heater more than 3-5 years old
Locating the Anode Rod in Rheem Water Heaters
In Rheem hybrid heat pump models (like PROPH50 T2 RH350), the anode is hidden under foam insulation near the condenser unit. You’ll need to:
- Remove the top metal cover (6-8 screws)
- Peel back foam insulation between condenser and fan
- Look for a 1-1/16″ hex bolt with plastic sleeve
Note: Some manuals claim the anode is inaccessible, but users confirm it’s removable with proper tools.
Step-by-Step Anode Rod Replacement
Tools Needed
| Tool | Purpose |
|---|---|
| 1-1/16″ socket | Fits anode rod hex head |
| Long extension (16″+) | Reaches deep-set anode |
| Dremel tool/knife | Removes plastic sleeve if needed |
| Bucket | Catch residual water |
Replacement Steps
- Turn off power at breaker and water supply
- Drain 2-3 gallons from tank (attach hose to drain valve)
- Remove top cover and foam insulation
- Clear plastic sleeve if obstructing socket access
- Use breaker bar to loosen anode (may require significant force)
- Install new anode rod and tighten securely
- Replace insulation and cover
- Restore water and power
Choosing the Right Replacement Anode
You have two options for Rheem water heaters:
1. Standard Sacrificial Anode
- Magnesium or aluminum/zinc alloy
- Lasts 3-5 years
- May cause sulfur smell in some water conditions
2. Powered Anode (Recommended)
- Titanium with electrical charge (like Corro-Protec CP-R)
- Eliminates sulfur smell completely
- Lasts 20+ years
- Requires electrical connection
Warranty Considerations
Rheem may void warranty if anode is removed without replacement. However, many users report Rheem support advised anode replacement to address sulfur smells. Document your work with photos.
Alternative Solutions
If anode replacement seems too difficult, consider these options:
- Tankless water heater conversion eliminates anode concerns
- Water treatment systems can reduce sulfur without anode replacement
- For propane systems, anode issues are less common
Maintenance Tips
- Check anode every 2-3 years
- Flush tank annually to remove sediment
- Consider water softener if you have hard water
- Monitor for leaks after replacement
With proper tools and patience, replacing your Rheem water heater anode rod is a manageable DIY project that can save hundreds in premature tank replacement costs.
