Rheem XE50T10HD50U0 — Water Heater

General Water Heater Guide

Quick maintenance guide

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Quick Specs

Typical Tank Capacity	40–80 gallons
Voltage (Electric)	240 V
BTU Input (Gas)	30,000–50,000 BTU/hr
Recovery Rate (Gas)	35–45 GPH
Recommended Temperature	120 °F

Maintenance Schedule

Task	How Often	Difficulty	Est. Time
Test the temperature and pressure relief (T&P) valve	Yearly	Easy	5 minutes
Flush the tank to remove sediment	Yearly	Medium	30–45 minutes
Inspect the anode rod	Every 2–3 years	Medium	20 minutes
Check for leaks around fittings and valves	Every 6 months	Easy	5 minutes
Verify temperature setting is at 120°F	Yearly	Easy	2 minutes

Troubleshooting

No hot water

Cause: Pilot light out (gas), tripped breaker (electric), or faulty thermostat

Solution: Gas: Relight the pilot per manufacturer instructions. Electric: Check the circuit breaker and reset if tripped. If the issue persists, the thermostat or heating element may need replacement.

Water not hot enough

Cause: Thermostat set too low, sediment buildup, or failing heating element

Solution: Check and adjust the thermostat to 120°F. Flush the tank to remove sediment. If an electric unit, test the heating elements.

Rumbling or popping noises

Cause: Sediment buildup at the bottom of the tank

Solution: Flush the tank to remove accumulated sediment. Regular flushing prevents this issue.

May require a professional

Water leaking from tank

Cause: Corroded tank, loose fittings, or faulty T&P valve

Solution: If water is leaking from the tank body, the inner tank is corroded and the unit needs replacement. Check fittings and the T&P valve for leaks first.

Reset Procedures

Gas Water Heater Pilot Relight

Turn the gas control knob to the OFF position.
Wait 5 minutes for any residual gas to dissipate.
Turn the knob to PILOT.
Press and hold the knob while using the igniter or a long match to light the pilot.
Continue holding for 30–60 seconds after the pilot lights.
Release the knob and turn to the desired temperature setting.

Electric Water Heater Reset

Turn off the circuit breaker for the water heater.
Remove the access panel (usually upper panel).
Press the red reset button on the thermostat.
Replace the access panel and insulation.
Turn the circuit breaker back on.

Safety Warnings

Setting the water heater above 120°F increases the risk of scalding burns. Higher temperatures are especially dangerous for children and elderly.

Call a professional

Never block the T&P relief valve discharge pipe. It is a critical safety device that prevents tank explosion from overpressure.

Call a professional

For gas water heaters: if you smell gas near the unit, do not attempt to light the pilot. Leave the area and contact your gas company.

Call a professional

Videos

Heat pump running on a Rheem hybrid electric high-efficiency tank water heater in energy saver mode

Tommy Anderson

This guide contains general maintenance information for Water Heater appliances. For model-specific instructions, consult your owner's manual.

This guide is provided for informational purposes only. Always consult your official owner's manual before performing maintenance. HomeBase is not responsible for any damage resulting from the use of this information.

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