375 ppm to 35 ppm (TDS/ppm in Aurora)

[whirley]

Wow, I'm really suprised.

My TDS out of tap ~375 ppm (***!!!)
After RO it's ~35 ppm

I'm shocked that Aurora's water is so bad!

Looks like I'll have to get the DI, soon.....

whirley

[Biodragen]

I get about the same reading out of my tap here in Harvard.
It is 350
Now I have a filter right on the spout and when I test that water it reads 365.
I don't get it. I find that those tap filter are crap.
In addition the water tastes better from the filter.

My RO-DI readings when brand new was 4
Now it has been reading 12.

I do not have it set up to use warm water verses the ice cold.
The cold I understand takes the life out of the membrane.

So there is my readings

Brian

[ostrow]

I have mine fed through the pipe ... the cold water pipe. How could you rig it to run warm through the filter?!? Puzzled.

In Oak Park, out of tap is 325-330. But I haven't tested RO level, I just test after the DI, which of course is 0.

[mhurley]

Whirley,

It also sounds like your membrane is dead/dying. Your RO membrane should remove 97-99% of your TDS particulates (read the DOW Filtec specs and you'll see this), yours is only doing about 90%. A good membrane should bring that number down to 3 or 4 TDS, DI would take care of the rest.

Mike

[Douglas LEHMAN]

Hello Joel
I'm in the process of upgrading my RO/DI feed line w/ amixing valve. I'll let you know how it turns out.

[Biodragen]

There is a special valve that you hook up to your water line
That mixes the cold and hot water before it goes into the membrane.

Mhurley has one, he could probably clue you in more.
I will say it is not cheap. I guess like $100.

[elefink]

Is the water going through a water softener first?

[whirley]

FYI, the RO unit has been sold.
Thanks all.

whirley