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Old 07-13-2013, 09:26 PM   #671
Veedo
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just a heads up to those buying RO water in bulk, my last 15 gallons from walmart were no good. wondered why my mash ph was so out of whack on my last batch, and why my starsan solution turned cloudy instantly. brought a sample of the water to work to test it, and conductivity was sky high.

 
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Old 07-13-2013, 10:00 PM   #672
ajdelange
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Just a reminder that shirt pocked 'pen' type TDS testers are pretty inexpensive.

 
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Old 07-13-2013, 11:55 PM   #673
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Quote:
Originally Posted by ajdelange View Post
Just a reminder that shirt pocked 'pen' type TDS testers are pretty inexpensive.
Ordering one tonight. Thinking about picking up a small RO system, but not sure if its really worth it vs just buying distilled by the gallon.

 
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Old 07-14-2013, 06:54 PM   #674
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I have been looking around at systems and for the money and portability, I think this may be the winner.

http://www.airwaterice.com/product/1...TEM-50GPD.html
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Old 07-14-2013, 07:10 PM   #675
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Quote:
Originally Posted by jimyson View Post
I have been looking around at systems and for the money and portability, I think this may be the winner.

http://www.airwaterice.com/product/1...TEM-50GPD.html
I strongly recommend against a system using the small canister filters. They do not last very long. Look for a 3 or 4 stage system with the more standard 10-inch filter canisters. You should be able to find one of those for about the same price. As long as all the equipment is mounted to a single plate, its as portable and almost as small as the system shown above. Getting a system with a Filmtec membrane is a good idea.

I also recommend getting a system that has an auto-shutoff valve. That way you can run the RO water into an open tank or tub and use a float valve to shut off the flow when the tank is full. Having a large supply of water waiting on you is far better than you waiting on the system to supply you with RO water.
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Old 07-14-2013, 07:18 PM   #676
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Good points. I have seen the ASOV and float available as an option. Do you have any recommendations?
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Old 07-15-2013, 11:54 AM   #677
ajdelange
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FWIW the length of time the membrane lasts depends largely on the volume and the nature of the water being fed. If it is hard it should be softened. I've had a couple of those cheapie systems and used one for well over 5 years before giving it away, still fully functional, to another home brewer who, while he doesn't brew that much is still using it AFAIK. The other I used less than five years before giving it away fully functional. If you only use the thing for brewing water and only run a couple of hundred gallons through it per year it should last a good long time. They indicate that the membrane should last 3 - 5 years and that the pre filters are good for 900 gal. Now I don't know whether that means 900 gal total input or 900 gal produced as the recovery for these units is set very low so that you can get by without softening the feed water first. At this price, how can you go wrong unless the system is a real POS? It does use Filmtec membranes and delivers 1 - 2 gph so you can collect enough for a modest size brew in a few hours.

This is intended to be a quasi potable budget system and if that is what you are looking for I'd give it a shot. If you want something fancier then pressure tanks fed from atmospheric tanks with float switches can be cobbled up for sure. I have two sets of plumbing in my brewery: RO and well and it's really nice to be able to just grab one hose or the other or open one valve or the other to fill the HLT but for a simple system like this one it should suffice to hook it up to your laundry sink (or wherever), drape the output line into your HLT and walk away for a few hours.

 
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Old 07-15-2013, 03:42 PM   #678
nemis79
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Mar 2012
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Hi AJ,

Great information in this thread. Here's my water profile, would it be any point for me to get an RO filter or can I basically treat it like it's already RO'd?

pH 7,57
Conductivity 10,5 mS/m
Alkalinity 0,651 mmol/l
Hardness 2,66 odH

CaCO3: 0,651 * 50 = 32,55 ppm
Calsium 18,20 mg/L
Clorid 8,03 mg/L
Magnesium 0,47 mg/L
Natrium 2,10 mg/L
Sulfate 4,81 mg/L

Is my calculation Alkalinity --> CaCO3 correct?

Thanks!

 
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Old 07-15-2013, 07:57 PM   #679
ajdelange
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As it is so low in mineral content there is little need for an RO system. Yes, you calculated the alkalinity correctly.

 
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Old 07-15-2013, 08:52 PM   #680
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Wow...I'm listening to the BN Brew Strong podcast on partigyle brewing recorded live at NHC and John Palmer just endorsed the use of 5-stars 5.2 stabilizer. Is this a new improved 5.2 stabilizer? Is he drunk? Have I wasted countless hours and batches following the sound advice in this thread?

 
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