Larso

Recipes 

Hi, my RO system has a very low throughput but I can easily enough fill, say a 5litre bottle while I stand over it, the tank then needs to refill. I'm wondering, how long can I store my RO water at room temperature in bottles?
Does it stagnate/degrade and how long does that take? Should I sanitise the bottles first?
I need about 35litres for my BIAB brew and I'm thinking of maybe filling a 5litre bottle every day for a week and storing them until I brew?

Thanks

L

bottlebomber

Recipes 

I'm not sure how often you brew but I wouldn't personally tax my drinking water system for brewing.. RO water is cheap, sometimes as cheap as 30¢ a gallon and so the cost is negligible in the world of brewing ingredients.

david_42

Recipes 

Sanitize the bottles properly and you'll be able to use the water months from now.

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Larso

Recipes 

Thanks guys, I dont brew very often so its not really taxing my system but its great to know I can store the water for a prolonged period. A week would probably be plenty of time, because I dont brew very frequently I tend to plan ahead....

L

Transamguy77

Recipes 

I see this posted every once in a while, where are you getting it for .30? In my area it's $6.50 for 5 gallons, it's actually cheaper to buy it by the gallon and that is still .85.

GarageDweller

Recipes 

Larso, i've wondered the same thing. The tank on my RO only stores about 2gal (not sure in liters) and then it runs really slow. I have to fill up in 2 gal increments over the course of a day, but i've never let the water sit more than over night. The question came up, in my mind, when I thought of the RO filter taking out the chloromine and/or chlorine that keeps the water sanitary. Good question!

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bottlebomber

Recipes 

Most Walmarts have a Culligan's water dispenser giving carbon filtered, RO, UV sterile water for... Actually it is 37¢ a gallon in most locations.

AZ_IPA

Recipes 

$0.25/gallon out in front of the circle k. Though I don't trust that it is RO.

Wynne-R

Recipes 

As long as the container is clean, it should keep forever. Personally, I’d probably dump it after a hundred years, just to be on the safe side. The plastic jugs might degrade. I keep 5 gallons(19L) or so under the sink for emergencies.

I get cheap RO water at a drive up kiosk. $.25/gal, $1.00/5gal bring your own container. Some of the big grocery stores have dispensers for $.40.

mabrungard

Recipes 

There is no problem with storing RO water forever in the proper container. In addition, it wouldn't matter if it did pick up an organism, since you're heating and sterilizing all water in the brewing process. Don't over think this. If you can find a big container, that would be better. The container does not really need to be closed.

In addition, if you run off your RO water directly into an open container instead of a pressurized tank, the water efficiency of the RO unit will be increased.

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Carmel, IN
BJCP National
Foam Blowers of Indiana (FBI)

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