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Old 12-23-2013, 08:39 PM   #11
MindenMan
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I used the GE brand RO system sold at Home Depot for around $150.00. I decided on this particular setup because it removes Arsenic, something very common in Northern Nevada. I am pretty sure it was a 4 stage system. I recently looked online for a new system with a holding tank bigger than 2 gallons. The system I found would do 35gpd and the price was reasonable.
RO membranes do not remove off flavors as I remember. 1) Carbon to remove chlorine 2) particulate filter 3) RO membrane 4) 2nd Carbon filter to polish flavor. The UV unit is a cool addition, but you have to bring the wort to a boil anyway. So why spend the extra money?

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Old 12-23-2013, 08:54 PM   #12
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All RO processes remove very high percentage of arsenic from water. The GE unit is no different.

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Old 12-23-2013, 09:07 PM   #13
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Ok! That's interesting. I would have fed in the hard water not knowing.

Would it be possible/practical to leave the RO waste water in the plumbing system and let it go to my washer, dishwasher, shower etc? I'm not paying for the water, but it would still be pretty soft and seems like a waste to not use it. It might be ok to have the RO only switch on when someone in the house was using water anyway, and just let the RO water accumulate until there's enough for the next brew day.

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Old 12-23-2013, 11:43 PM   #14
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Most codes require that the concentrate (waste water) be discharged to the sewer/septic system through an air gap. The GE units waste a lot of water (4 gal goes down the drain for each gallon of permeate produced) but for typical home brewing (10 gal concentrate) you would only be dumping 40 gal. To get it back into your home plumbing system you would have to
1)collect it somewhere
2)pressureize it up to a pressure greater than your mains/bladder tank pressure
3)violate code

Because the recovery is so low (20% or less) on the GE units the concentrate will only be 20% stronger than the feed water. If you want to save it and pump it out onto the lawn or something like that or water the garden with it that's fine.

Most of the small systems, including the GE just run until the pressure in the bladder tank gets high enough and then shut off the feed stream so it is automatic. And you can, of course, attach as big a bladder tank if you want. It will still fill til the pressure gets high enough to trip the valve. On no account will it pressurize to above the mains pressure but feed will continue to flow through without the automatic shutoff.

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Old 12-24-2013, 01:19 PM   #15
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I'm happy with the system and customer service I got from Air, Water & Ice. The system I got was this one:

http://www.airwaterice.com/product/HURRICANE/Hurricane-Dual-HomeReef-with-Permeate-Pump-Tank.html

I had them change out the 2.2 gallon tank for a 5 gallon one and add a pressure gage to the system. The added cost wasn't much.

For brewing you wouldn't need the DI stage. I only got it since I plan on getting back into the saltwater aquarium hobby again some day. The DI stage output is separate from the RO and has a shutoff. The RO goes into the storage tank.

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Old 12-24-2013, 01:20 PM   #16
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Quote:
Originally Posted by ajdelange View Post
3)violate code
Indeed. The way folks buy green these days it seems like there would be a market for a system that accumulated RO water in a tank for human consumption and use the concentrate for everything else. In all likelyhood the tank would be full most of the time since every load of laundry, shower, etc would result in more RO water being generated.
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