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Ive never done reverse osmosis but Ive built water filtering fountains for my cats.

You'll want NSF grade (food grade) carbon from either bone or coconut shells with a fine enough mesh to provide resistance. I bought 10 pounds of this one and its still lasting over a year:

http://www.buyactivatedcharcoal.com/product/granular_activat...

Next you'll want to get silver tubing and adapters to kill all bacteria. You'll also be able to connect your carbon filter inline with the tubing and use a pump to push your water through the filter.

This is the best NSF antibacterial silver infused tubing money can buy:

http://www.newageindustries.com/clearflo-Ag-47-antimicrobial...

I recommend NSF Eldon James antimicrobial tube fittings:

http://www.usplastic.com/catalog/default.aspx?catid=550

You can also find the clearflo tubing on usplastics but only in 100 feet rolls. I can ship some if you need only a few feet, my email is in my profile.

Next youll want a transparent/translucent inline refillable filter. I recommend a 1/2" FPT but you can get larger/smaller depending on how much water you want to filter and what your tubing, adapters, and pump size is, everything needs to match. 1/2" ID for tubing and 1/2" NPT / barbs is very compatible and provides enough flow for most purposes. Theres a lot of these on the market, here's a good google search that sources images from amazon, ebay, and some smaller vendors:

https://www.google.com/search?q=inline+refillable+filter&prm...

Unless you hook this contraption up to an actual water line( your sink), you'll need a pump to push the water through the carbon. No, gravity is not good enough - if the filter is worth its salt it will provide a resistance much greater than what gravity can provide.

I recommend Danner steel pumps. Their plastic ones suck, trust me, I've burned through a few. This pump has really shined:

https://www.amazon.com/gp/product/B000BJK3QQ

Now if you choose to use this pump, go with 1/2" on everything. Here is a barbed adapter that will screw perfectly into the top of the pump and seal perfectly with 1/2" ID tubing:

https://www.amazon.com/gp/product/B008TSRZJE

Let me know what you finally settle on and how it goes. Filtration is lots of fun!! Cheers! :-)




I'm not very familiar with filtration technologies. Is this better than a simpler setup involving one Berkey filter?


I dont know much about Berkey filters. It looks like they are gravity powered. They might be weaker than the filtration you could accomplish with line or pump pressure.




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