A.O. Smith Gas Water Heater BTR200

Measure the depth of lime buildup in the heater

Is the lime buildup 2 inches or more?

Water Temperature and Usage Assessment

Record the current water temperature

Is the water temperature above the recommended range?

Water Softening Equipment Check

Inspect the water softening equipment for proper operation

Is the water softening equipment effectively reducing water hardness?

CAUTION: Property Damage Hazard

Ensure water heater is turned off and cooled down

Gather necessary tools for inspection

Locate the anode rod on the water heater

Inspect the anode rod for corrosion or pitting

Is the anode rod corroded or pitted?

Is the water artificially softened?

Shut off gas supply to the heater

Remove outer cover plate from lower side of heater jacket

Remove hex head screws securing tank cleanout plate

Remove lime, scale, or sediment carefully

Inspect cleanout plate gasket for damage

Ensure no one is in front of or around the outlet of the Temperature-Pressure Relief Valve discharge line.

Ensure water discharge will not cause any property damage.

Lift the lever at the end of the valve several times to check if the valve seats properly and operates freely.

Did the valve reset completely after manual operation?

Is the valve continuing to release water after manual operation?

Ensure all ignition sources are away from the faucet when turning on hot water.

Do not smoke or have open flames or sparks near the heater.

Do not mix UN•LIME with other chemicals.

Avoid contact with magnesium, aluminum, or galvanized metals.

Use rubber or neoprene gloves, especially if you have open sores or cuts.

Turn off fuel and/or power supply to the heater.

Open hot water side of faucet closest to heater and allow water to run until cool.