After changing the filters in my reverse osmosis system, why do I have to run the water for 24 hours?

I just changed the filters in my reverse osmosis filtration system. The instructions say to run the water for 24 hours. This seems excessive with the drought. Do I really need to let the water run for that long?
Is there carbon in the filters? Do they put things in filters that we shou;dnt be consuming and how do we know it is all out after 3 tanks?

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One Comment for “After changing the filters in my reverse osmosis system, why do I have to run the water for 24 hours?”

Ginger says:
September 4, 2010 at 8:34 pm

Over the next 24 hours, you will need to fill the tank and emply it at least 3 times. It is done that way to get the carbon out.