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Clean a H/W tank

You first turn OFF the power to tank, then attach a hose pipe to the bottom fitting, lead it outside or to any drain, turn on the valve by it, turn OFF your inlet valve and open the relief valve so air can enter the H/W tank. Let the whole tank empty - it takes about 30 -40 minutes. Next, when empty, turn ON the inlet valve and let cold water run through the tank and out the hose, now you will see the sludge coming out. Let this run 5-7 minutes or until water is coming through clean. Now you are done . Let it fill, then turn on power.

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11y ago
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14y ago

Most water heaters have a 4 or 6 bolt flange in the front where it can be removed, thus allowing you to take a broom to scrub the inside of the water heater to remove any debris and clean the inside tank, scooping out the rubbish by hand is recommended.

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15y ago

If you have a way to flush vinegar through it, that is probably the best way. That's the way you flush the scale out of tankless water heaters.

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Q: How do you clean calcium deposits from the water heater?
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How do you remove calcium deposits out of the actual water?

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