If your Rheem water heater is leaking from the bottom, check the drain valve, temperature and pressure relief valve, or the tank for corrosion or damage.
Discovering water pooling under your Rheem water heater can be alarming. A leak from the bottom often signals serious issues requiring immediate attention. This guide explains why it’s happening and how to address it.
Why Is My Rheem Water Heater Leaking from Below?
Bottom leaks typically indicate one of these critical problems:
1. Tank Corrosion Failure
The most serious cause of bottom leaks is internal tank corrosion. Rheem’s glass-lined tanks resist corrosion, but minerals in water eventually wear through this protection. Once corrosion breaches the steel tank, replacement is your only option.
Signs of tank failure:
- Rust-colored water
- Visible rust on tank exterior
- Persistent leaks after checking valves
2. Faulty Drain Valve
The drain valve at the tank’s bottom commonly leaks. Try tightening it gently with a wrench. If dripping continues, replace the valve. Rheem recommends using only manufacturer-approved parts.
3. Sediment Buildup Damage
Minerals settling at the tank’s bottom accelerate corrosion. Annual flushing prevents this. If neglected, sediment can:
- Erode the tank floor
- Overheat the lower element
- Cause premature failure
Emergency Steps for Bottom Leaks
| Leak Severity | Immediate Action |
|---|---|
| Slow drip | Turn off water supply, place bucket, call plumber |
| Steady stream | Shut off water and power/gas immediately |
| Large puddle | Emergency shutoff, water extraction, professional help |
When to Replace vs. Repair
Consider replacement if:
- Tank is over 8-10 years old
- Multiple components are failing
- Repair costs exceed 50% of new unit price
For newer units, replacing individual parts like the drain valve or heating elements may be cost-effective.
Preventing Future Leaks
Annual Maintenance Checklist
- Flush tank to remove sediment
- Inspect anode rod (replace if 50% depleted)
- Test T&P valve operation
- Check for pipe corrosion
Installing a whole-house water filter reduces mineral buildup that causes corrosion.
Professional Help vs. DIY
While some fixes like tightening connections are DIY-friendly, most bottom leak issues require professional diagnosis. Certified technicians have specialized tools like electronic leak detectors to pinpoint problems accurately.
Remember: Water heater leaks can cause thousands in water damage. Addressing them promptly protects your home and ensures continuous hot water supply.
