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#1
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TDS on pure filters actually goes up after use?
Hello,
Just wondering if anyone else has experienced this? I have used a 2-stage cartridge and a 3-stage and both when I test the tds goes up by like 30points after being filtered? I do the 5minute flush before I ever test in the very beinning of the filters life. Thanks! |
#2
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P.S.
I just use this for drinking water not tank topoff. |
#3
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How long has it been set up?
Have filters been changed? |
#4
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These are brand new filters
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#5
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#6
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Are you saying the TDS is higher compared to your tap water? Either something is wrong with the filter, your tds meter or the hookup.
That's like an AC unit that raises the temperature...
__________________
"She had a deep, throaty, genuine laugh, like that sound a dog makes just before it throws up" |
#7
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usually all those filters are is carbon to make the water taste better so you think it is actually doing something.
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#8
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Are you sure that you're taking your measurements on the treated water line instead of the brine coming out of the RO filter?
An increase of 30 ppm is about right for the reading you should get on the brine or waste water line.
__________________
"In all seriousness the SEC is the strongest conference" GrimReefer |
#9
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#11
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-out |
#12
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Ohhhh. I don't have any experience with those units, but I do have a lot of industrial water treatment experience that might provide an answer. In industrial carbon beds and ion exchange resin beds, we often use anti-clumping agents such as aluminum sorbate. These agents often give a really high TDS and aluminum concentrations in the initial flush of the bed. However, these concentrations generally drop off pretty quickly. I don't know if this type of agent was used in the material provided with your tap water purifier, but it might explain the TDS reading.
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"In all seriousness the SEC is the strongest conference" GrimReefer |
#13
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a pure filter is a di filter. get a ro/di. your tank will thank you.
__________________
Failure is an option..............for losers. Don't be a loser. |
#14
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http://www.target.com/gp/detail.html...sin=B0007ZYUAE Here is a pic of the unit http://www.target.com/gp/detail.html...sin=B0007L7BTU I use a Bare Bones R/O for my tank which is beside the point. FYI the TDS of my R/O is always around 2. My TDS are not so bad that I need a DI. |
#15
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Based on the description, it's a 3 stage unit with a sediment filter, a carbon filter, and a DI filter.
__________________
"In all seriousness the SEC is the strongest conference" GrimReefer |
#16
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haha, well you got me stumped. maybe it is defective?
__________________
Failure is an option..............for losers. Don't be a loser. |
#17
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In any case, a water filter shouldn't raise your TDS. That just means it's adding more who-knows-what to it. I say get another one or use another filter. Brita isn't bad if you don't mind dealing with the pitcher and actually lowers the TDS quite a bit.
__________________
"She had a deep, throaty, genuine laugh, like that sound a dog makes just before it throws up" |
#18
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Justed checked my Pur
115 tds out of the tap 172 tds out of the Pur 130 tds after running a cup of water through the Pur I suspect Muttling is right that it has to do with the resins used. Still tasts better than my tap water.
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Less technology , more biology . |
#19
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I don't think there are any resins in either Pur or Brita. I believe they are just a sediment and carbon. After the carbon is exhusted it probably just relases more impurites then what you started with.
I prefer the 1000 yr old glacier water that comes from giant chunks of ice floated across the ocean to Japan and then melted and bottled. |
#20
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So this really concerns me. I tested on two filters two seperate occassions. |
#21
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When I tested it was like after the first 10minutes of purging the filter and 10 times subsequent to that so it is not that these things are exhausted, unless the carbon gets exhausted that quickly.
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These things are not cheap. I mean $14.99 for barely 3 months is no deal. So it kinda ticks me off that they dont work. Maybe Ill just have to switch to some osbourne sedimentation r/o type filter.
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#23
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if you are so concerned about the tds. get a ro/di system. you can tee off the ro for drinking water.
i'm sure it'll be cheaper in the long run because you will need to replace the pur filters more often at @$15 a pop.
__________________
Failure is an option..............for losers. Don't be a loser. |
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