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#2
05/10/2005, 04:31 PM
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How pure is the water going in? That sounds too good to be true, but if you meter is accurate, don't look a gift horse in the mouth.
__________________
Rich Overton Hit the little red house above for the ARC website! You know you want to! |
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#3
05/10/2005, 04:39 PM
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Life expectancy
I just talked to customer service at SpectraPure earlier today and was told with decent quality source water your membrane should last a year, but the DI cartridge usually only lasts for 400 gallons.I change mine at these intervals, but dont have a TDS meter so might be changing more often than needed.
Steve |
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#4
05/10/2005, 05:29 PM
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It all depends on the source water going into the DI (not the source water going into the whole unit although the dirtier, the less likely your RO is going to be able to handle everything adequately) and what your DI resins are rated for ... for example say your resins are rated to absorb 3000ppm of dissolved ions.
You have source water coming out of your DI at about 2 ppm (what I actually get out of my RO) I can theoretically make up to 1500 gallons of 0 TDS water before needing to switch my DI. Now for somebody that's making 10ppm RO water, you'll theoretically only be able to produce 300 gallons of 0 TDS water. Peace, John H. |
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#5
05/10/2005, 05:33 PM
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well, im making 2 gals a day plus 40 gals once a month, so thats 100 gals a month...............water going in is 30 tds............i was told membrane lasts 2-3 years.............but di lasts about 400-500 gals..................1300 gals on this one lol seems odd................
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#6
05/10/2005, 05:36 PM
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wasp... is water going into the DI unit 30 tds or is it 30 tds going into the whole unit as in before it even hits the RO? If you have 30 tds just going into the whole unit, you have really clean water around there.
I am just wondering b/c C-ville water is pretty clean w/ a TDS of only 50-60. Peace, John H. |
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#8
05/10/2005, 06:39 PM
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You have extremely clean water. You should check the TDS coming out of the RO unit, I guarantee it'll be at 1 or 2 TDS, which would give you 3000 gallons and 1500 gallons, respectively for a 3000ppm DI filter cartridge. I thought I got lucky w/ my water.
You could probably almost use your tapwater if you check for copper, phosphates and nitrates. If those are low, I might even consider just pushing it through the carbon cartridges at a slower rate and see what TDS and check for chlorine chloramine, which should be taken care of by the carbon. Peace, John H. |
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#9
05/10/2005, 07:37 PM
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huh, its wierd cuz i tested a year ago when i set this up and my tap was 56, today it was 30.................municipal water , maybe they doing more downstream i dont know............even stranger yet, i have a kenmore setup for drinking water under my kitchen sink , it goes thru 2 filters and some how the 30 becomes 76, and the filters arent old either..............and water tastes better than from the tap, does removing taste somehow leave solids in the water?
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#10
05/10/2005, 07:45 PM
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TDS or total dissolved solids is a misnomer as TDS actually only measures conductance through the water so in essence what you are actually measuring is total ion concentration. It does not measure solids.
I am confused as to why your TDS would go up after going through both the filter floss and the carbon. The carbon is what will remove any organics, chlorine, choramine from your water so it doesn't taste as bad. Peace, John H. |
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#11
05/10/2005, 08:50 PM
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i run the tap thru one each of these, and it goes from 30 to 76, it should go down..............
http://www.sears.com/sr/javasr/produ...id=04234377000 http://www.sears.com/sr/javasr/produ...id=04234373000 |
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