Typical RO/DI water test parameters?

[quaffin1]

Can anyone tell me what typical RO water should test out at?
I recently tested the RO/DI water that I get from LFS.
Using Pinpoint monitor I get pH of 9-10 depending on which jug
of water that I test.
Alk test show 5 dKH!
I would have expected the RO water to be somewhere close
to the neutral range of around 7.0 pH.

 

[drew2005]

Originally Posted by quaffin1
Can anyone tell me what typical RO water should test out at?
I recently tested the RO/DI water that I get from LFS.
Using Pinpoint monitor I get pH of 9-10 depending on which jug
of water that I test.
Alk test show 5 dKH!
I would have expected the RO water to be somewhere close
to the neutral range of around 7.0 pH.
I believe it should test around 7.0 and the ALK should be 0.

 

[barchtruong]

not sure how you get your DI at PH=9 or 10
if so, you might be ripped off and bought water that's not quite DI yet.
I bought my DI and it's hardly get to PH=8.0

 

[sign guy]

my tds is at 0

 

[barchtruong]

Originally Posted by sign guy
my tds is at 0
where can I find one of those watertestmeter for tds??

 

[drew2005]

Originally Posted by barchtruong
where can I find one of those watertestmeter for tds??
Got mine off the big auction site. Inline TDS meter for $14.95. Works great.

 

[mr. green]

That is a high pH for water being purified. Find out what there tap source is and also see if they chemically treated there membranes or DI bed lately. Large RO and DI systems need chemcial treatment to remove scale and recharge the bed. May have not rinsed well if this was done.