Reverse osmosis question....

Hey guys... what would the ppm of water be after going through the r o filter??? my water is 300 ppm before the filter and 70 ppm after...

they all claim 0 PPM but i doubt that they get all the way down to 0

is your RO new? because youre supposed to let it run for a few hours

Also how many pre filters are there? some have 1 some have 2 and some have 3 or more.

What brand/where did you get it?

Yeah bro... Its brand new and been running for 2 hours now and i checked again and its sitting a 16 ppm.... delighted... got it on amazon for 65 euro... cheap... has 3 different filters... thanks for the reply ~ chris

My buddy's water comes out of his RO at 1ppm. YMMV.

Ive never actually tested mine. the ppm meter we got was broken before we made it to the spot.

But ive tried freezing it before and it wont in a normal freezer set to medium. Which means its pretty close to 0

Pure water freezes at 0°C/32°F, having stuff dissolved in it lowers the melting point.

But having nothing to start the crystallization will cause it not to freeze until a much lower temperature. Thus it must have been very close to 0 ppm.

Heres a source i found: http://www.cosmosmagazine.com/news/waters-ultimate-freezing-point-discovered/

Im not saying it took my water i R/O'd until -41 degrees Celsius to freeze but it wouldnt freeze in my freezer which is set to about 0 to -10 degrees Celsius +/-

Unless it is really high-end system, you will have trouble getting 0 ppm's. Mine sits at 10 ppm's new, however I have really hard water where I am located. I swap out the filters @ 25 ppm's. This usually takes 2.5 months of run time to achieve this reading. I have also went to the local grocery store and purchased water from an outside RO dispenser for .25 cents/gal and it came out at 17ppm's. Again, I have bad water too. Hope this helps bro.