Rheem 81VP6S Water Heater Leaking? Here’s How to Fix It

If your Rheem water heater model 81VP6S is leaking, check for loose fittings, corrosion, or a faulty drain valve, and consider professional repair or replacement.

Discovering your Rheem 81VP6S water heater leaking can be alarming. This guide covers common causes, troubleshooting steps, and repair solutions to address leaks in your 6-gallon point-of-use water heater.

Rheem water heater with visible leak and water damage

Common Causes of Rheem 81VP6S Leaks

Temperature & Pressure (T&P) Relief Valve Failure

The T&P valve is a critical safety component designed to release water if pressure exceeds 0.98Mpa. When faulty, it may drip continuously. Test by lifting the valve’s test lever briefly – if water continues flowing afterward, replacement is needed.

Drain Valve Issues

The drain valve at the tank bottom can develop leaks from sediment buildup or worn seals. Tighten the valve gently first – if leaking persists, consider replacing this inexpensive part.

Internal Tank Corrosion

Despite Rheemglas enamel protection, mineral deposits can eventually compromise the tank. Look for rust-colored water or moisture at the tank’s base. Tank replacement is typically required for this issue.

Faulty Pipe Connections

Loose inlet/outlet fittings or degraded pipe tape can cause connection leaks. Check all plumbing joints and re-tighten or re-seal as needed.

Rheem water heater model 81vp6s leak guide

Step-by-Step Troubleshooting

  1. Locate the leak source – Dry all surfaces completely then monitor where moisture first appears
  2. Check valve connections – Verify T&P valve and drain valve are secure
  3. Inspect tank condition – Look for rust streaks or mineral deposits
  4. Test water pressure – High pressure (above 80 psi) can stress components
  5. Examine heating element gaskets – Leaks here indicate seal failure
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Repair Solutions for Rheem 81VP6S Leaks

Replacing the T&P Valve

When replacing the UL-approved T&P valve:

  • Turn off power and water supply
  • Drain several gallons from the tank
  • Unscrew old valve and install new one with pipe tape
  • Test operation after refilling

Fixing Drain Valve Leaks

For persistent drain valve leaks:

  • Use a hose cap as temporary fix
  • Replace valve entirely for permanent solution
  • Consider installing a quality leak detector for early warnings

Addressing Tank Corrosion

For tank leaks:

  • Check anode rod condition – replace if depleted
  • Flush tank annually to reduce sediment
  • Consider water treatment if hardness exceeds 7 gpg

Preventive Maintenance Tips

Maintenance Task Frequency Benefit
Tank flushing Annually Reduces sediment buildup
Anode rod inspection Every 3 years Prevents tank corrosion
Valve testing Bi-annually Ensures proper safety operation
Pressure check Quarterly Prevents stress on components

When to Call a Professional

While many leaks can be DIY-repaired, seek professional help for:

  • Tank replacement (requires proper disposal)
  • Electrical component issues
  • Persistent leaks after attempted repairs
  • Installation of specialized plumbing tools

For complex installations or if your unit is still under Rheem’s 6-year warranty, contact authorized service technicians. The Rheem official website provides certified repair locators.

Regular maintenance using quality replacement parts can extend your water heater’s lifespan and prevent leaks before they start.



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Joye
Joye

I am a mechanical engineer and love doing research on different home and outdoor heating options. When I am not working, I love spending time with my family and friends. I also enjoy blogging about my findings and helping others to find the best heating options for their needs.