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How to sanitize a water tank?

Updated: 11/12/2022
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βˆ™ 12y ago

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Start with an almost full and fresh water tank. Turn the water heater off and let the water cool. Dilute 1/4 cup of household bleach for each 15 gallons of tank capacity in to a gallon of water. Add the chlorine or water solution to the water tank. (Do not pour straight bleach into the RV fresh water tank. ) Let the chlorinated water run through them for 1 or 2 minutes one faucet at a time. You should be able to smell the chlorine. Make sure you are using the water pump and not an external water supply. Top off the RV fresh water tank and let stand for at least three hours over night is better. Drain the system completely by flushing the faucets for several minutes each. Open the fresh water tank drain valve to speed up emptying the tank. Open the hot water tank drain plug and drain until it is empty. Close all valves and faucets and drain plugs. Fill water tank with fresh water. Flush each faucet for several minutes each repeating until the tank is again empty. (Make sure you are using the water pump and not an external water supply.) Fill the tank again. The water should now be safe to drink but if the chlorine odor is too strong you can repeat the fresh water flush. Your RV fresh water system should now be safe to use.

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Q: How to sanitize a water tank?
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