Global Water G5 Operation Manual page 18

Sanitize
Fill main water tank with water. Add 1-2 teaspoons of liquid
chlorine bleach. Let stand for 5-10 minutes. Drain the water then let
water from filters refill tank and drain a second time. Remember to
drain from dispensing spigots also.
Note: Upon completion of cleaning, wait at least 10 minutes
after the power cord is plugged in before turning on the Hot and
Cold Water buttons.
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