Water HeatersBeginner
Water Heater Maintenance
Time
30–90 min
Steps
5
Pre-check
3 items
Skill
Beginner
Scope
Maintain your water heater: flush sediment, inspect the anode rod, test the T&P valve, and check venting and connections to extend its service life.
Safety
Read before starting
Turn off power/gas as required; beware hot water; verify no gas leaks after work.
Pre-Check
3 items · complete before you start0 / 24 complete
Steps
Visual Inspection
- Check for leaks, rust, or scorch marks
- Verify vent (gas) intact with proper slope
- Confirm T&P valve discharge piping clear to safe location
Sediment Flush (Pro Task)
- Power/gas OFF if needed
- Attach hose; drain a few gallons
- Pulse cold inlet to agitate; drain until clearer
Tips
- Rumbling or popping noises often indicate sediment buildup—flushing is a key Pro Task to extend tank life.
✅Continue Gate:Drain runs clear enough?
Anode Check (annual)
- Turn OFF cold inlet, open a hot faucet to relieve pressure, and drain enough water so level is below the anode port
- Locate anode at top of tank (hex head under a cap on many models); clear overhead space before removal
- Use correct socket and breaker bar to loosen anode (factory torque can be high)
- Inspect rod condition; replace if less than half remains, heavily pitted, or wire core is exposed
- Install replacement anode with approved thread sealant per manufacturer guidance; tighten securely without damaging tank threads
- Reopen cold inlet, purge air from hot faucet, and verify no leaks at the anode port
⚠ Warnings
- Do not apply excessive force that could damage tank fittings or threads.
✅Continue Gate:Anode OK or replaced?
T&P Valve Test
- Lift test lever briefly to ensure flow
- Release to reseat; check for drips
- If valve will not reseat: turn OFF power/gas and cold inlet, then drain tank to below T&P opening
- Remove discharge tube and old T&P valve, install matching replacement with thread sealant on male threads only
- Reconnect discharge tube to a safe code-compliant termination point, refill tank, purge air, and restore power/gas
✅Continue Gate:Valve functional and reseated?
Restore & Settings
- Restore power/gas; relight if needed
- Set thermostat to 120°F for safety and efficiency
- Consider an insulating blanket on older tanks to optimize energy use
- Label shutoffs; note maintenance date
Code notes
- Standard water heater service life is 8–12 years; use Building Intelligence Center (Parts Lookup Serial Decoder) to identify equipment age from serial number.