State Industries GPX, GSX Aluminum Hydroxide, If tank is new with no lime build-up to any degree

BULLETIN 14

ALUMINUM HYDROXIDE

SYMPTOMS

“Crackling”, “gurgling”, or “popping” noises from new water heaters (installed less than

six months).

CAUSE

In a few isolated parts of the United States where the water supply has a relatively

high pH (8+), water conditions will react with the aluminum anode to form excessive

amounts of aluminum hydroxide on the anode and in the bottom of the tank. Aluminum

hydroxide looks like “jelly beads” or a green, blue or gray gel like substance in the

heater drain or at faucet aerators.

THE FIX

This procedure should only be performed by someone with abilities equal to a licensed

tradesman. Aluminum hydroxide can be removed by using one of the methods outlined.

If tank is new with no lime build-up to any degree:

1

Turn off the heater.

2

Remove the anode.

3

Flush the tank thoroughly with water.

4

Replace the aluminum anode (identifiable by smooth surface on plug) with

magnesium anode (identifiable by weld bead on plug).

If tank is new with lime build-up to any degree:

1

Turn off the heater.

2

Drain the heater.

3

Remove the anode.

4

Add UN-LIME to the tank.

20-40 gallon models (use 3 gallons of UN-LIME)

41-65 gallon models (use 5 gallons of UN-LIME)

66-100 gallon models (use 7 gallons of UN-LIME)

5

Heat the UN-LIME to a temperature between 140°F to 160°F.

• GAS - Heat for 7 to 10 minutes.

6

Shut off the water heater.

7

Allow the heated UN-LIME to stand for up to 12 minutes.

8

Drain and flush the tank. Caution: UN-LIME will still be hot.

9

Replace the original aluminum anode with a magnesium anode.

10

Fill the system with water.

11

Turn heater fuel “ON”.

NOTES

Since aluminum hydroxide is a product of a chemical reaction dependent on the water

condition, any treatment is not considered warranty related.