TDS readings

[marki24]

Input is 36 ppm and output is 6 ppm. Is the output too hight?

Thank in advance.

 

[pauliwalnuts]

Ok. Where exactly is that ?

 

[marki24]

What do you mean?

 

[pauliwalnuts]

Where is the TDS meter installed or possitioned on your RO/DI unit ?

 

[rebelson]

By output I'm assuming you mean the 'finished product' aka the water you will put in your tank? If so, the TDS reading should be zero.

 

[marki24]

yes output is the water i will be using for my tank. Not sure what difference does it make where it is positioned or installed. Thank you.

 

[rebelson]

Your welcome.

Yea, the output reading needs to be zero. Sounds like your cartridges need to be replaced.

 

[pauliwalnuts]

yes output is the water i will be using for my tank. Not sure what difference does it make where it is positioned or installed. Thank you.

In that case, what Rebelson just said "it should be zero".

 

[noelskii]

Not sure what difference does it make where it is positioned or installed. Thank you.

if you install your tds meter after the FIRST stage of filtration then obviously it's gonna have a higher reading than the second stage and so on...you must have the handheld one where you just dip it in the 'finished' product..

 

[chinatown]

anything over 0 for output would be considered too high.

 

[marki24]

Well it is a dual TDS meter and I installed it to where the water comes out of the faucet and then after it goes thru 4 stages of filtration and that iswhere my ouput is installed.

 

[KathyC]

I have that same one Mark, and your description sounds correct
I am assuming at some point your output did come out at zero? ..which is where you want it to be.

First you want to change out the cartridges on the bottom od the unit - the carbon and plain white filter looking ones, and the resin if yours has a resin chamber. If you TDS doesn't come down to zero, you may have to replace the membrane (the expensive cartridge), but try changing out the others first.

Many of our vendors carry these in stock

 

[Boomer]

Mark

What is is water coming from a RO unit, a RO/DI unit or some other type of filtration ?

 

[marki24]

4 stage coarlife Rodi unit.

Thanks Kathy. I just changed all the cartridges about 2 months ago. Is it a good idea to blast it with water and maybe that will clean them out (not the membrane) but the other ones.

 

[Boomer]

Mark

Input is 36 ppm ...from RO or tap water

and output is 6 ppm. .......form the DI correct

 

[marki24]

current output from the filter is 003ppm. The output is from the waste water.

 

[MO~IDOL]

current output from the filter is 003ppm. The output is from the waste water.

Marki did you connected the output to the waste water line? it should connect to after DI.

 

[Boomer]

Mark

You can not have a output of .003 ppm TDS no TDS meter goes that low. You meter with that number must me in Siemens. Who's meter do you have ?

I need to know TDS of tap water, TDS of RO water to the DI, NOT the TDS of the waste water, which goes down the drain and TDS of the water leaving the DI. A RO will have two lines, one waster water and one clean RO water. The clean RO water goes to the DI input line. The "dirty" waste water should go down the drain.

 

[KathyC]

Mark - can you please post a pic of where you have the TDS meter hooked up to - in both places?

That would help us a lot!!

 

[marrone]

What he's saying is the meter reads 003ppm which is 3ppm not .003ppm. The meter reads with 3 numbers.