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Old 03-25-2013, 05:46 PM   #1
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Default Reverse Osmosis systems are expensive

After some research, I have noticed that under-sink reverse osmosis systems cost $150-400 on average for regular home use.

How much quality is being sacrificed by going with the cheaper options? Is the pressure tank included in this price? How often do filters need to be replaced? Is there any other routine maintenance that needs to be done?

And most importantly, can anyone recommend a more economical way of getting RO water?

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Old 03-25-2013, 06:30 PM   #2
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I get it for about $0.35/gal in stores around my house. I brew 15 - 20 batches per year and use 10 gallons for each batch, of which half is my tap and half is RO. My annual cost is, at most, $35 for RO water.

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Old 03-25-2013, 06:35 PM   #3
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I paid $119 for mine, but now it's $129. It doesn't have the pressure tank, but it works great for my needs.

I haven't needed to change any filters or membranes or anything yet (had it a bit over a year, and I brew quite a lot).

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Old 03-25-2013, 06:42 PM   #4
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Quote:
Originally Posted by jmf143 View Post
I get it for about $0.35/gal in stores around my house. I brew 15 - 20 batches per year and use 10 gallons for each batch, of which half is my tap and half is RO. My annual cost is, at most, $35 for RO water.
Why you gotta go and bring LOGIC to the discussion?!
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Old 03-25-2013, 06:50 PM   #5
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I picked this one up a year ago and love it! So nice having RO water at home, and not having to go out to fill up jugs at the grocery store. And compared to paying 50 cents a gallon at the grocery store, this has already paid for itself for me...

http://www.bulkreefsupply.com/brs-4-...tem-75gpd.html

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Old 03-25-2013, 07:59 PM   #6
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I get it for about $0.35/gal in stores around my house. I brew 15 - 20 batches per year and use 10 gallons for each batch, of which half is my tap and half is RO. My annual cost is, at most, $35 for RO water.
That cost is not too bad, but what about the PITA cost to have to go out and get it? That's another variable that may influence a buying decision. For me, that would be a deal breaker since I don't want to go to another store and pick up big things of water.

My RO system is used for a lot more than brewing. I think my system was about $150 with a tank. I also added another 20 gal pressure tank that I picked up locally off of Craigslist.

Considering that all the components are virtually identical and are now a commodity, there is no advantage in buying a name brand or expensive system. You need 3 things: particulate filter, carbon filter, and membrane (3 stages). Anything more than those 3 stages is not really needed. Some systems have an extra particulate filter and post carbon filter. Some even have deionizing columns to get out that last little bit.

The one component that you may want to target is the membrane manufacturer. Filmtec (Dow) has a good reputation and is worth seeking. All the rest of the filters and canisters are generic and all should generally be equivalent.
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Old 03-25-2013, 08:16 PM   #7
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Old 03-25-2013, 08:17 PM   #8
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Are these units identical aside from one having a pressure tank?

http://www.bulkreefsupply.com/brs-4-...tem-75gpd.html

http://www.bulkreefsupply.com/brs-4-...tem-75gpd.html

I assume the below unit would be sufficient, Martin?

http://www.bulkreefsupply.com/catalo...t/view/id/830/

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Old 03-25-2013, 08:48 PM   #9
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While the 3 stage unit IPA mentions above should be good enough, its use of the small filter cartridges is not a good idea. The unit is rated at 75 gpd and the flow rate through a carbon filter is critical to its performance. Getting a RO unit with either the typical 10" cartridges or the super-sized 20" cartridges is recommended.

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Old 03-25-2013, 09:06 PM   #10
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Here's one very similar to the one I bought:

http://www.bulkreefsupply.com/brs-4-...tem-75gpd.html

I had them leave off the "DI" part, and saved $10. I don't know if they still do that, but that's what I did. It was a bit over a year ago.

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