I've just tested 15 gallons of water that I've just done with my RO
unit, and it's come out at 2ppm! I did 3 tests and they all came out the same. Two in different cups, and one straight in my water container tank. Very pleased. I then put the water in some plastic containers and carried it downstairs, before putting it back in the tank. I then got a reading of 4ppm - perhaps the containers added the extra bit, or it might've been a bit of dust or whatever.
At any rate, 4ppm is fantastic from a normal RO
One strange thing though, I RO
'd a little bit of water into a cup yesterday to test the ppm
, and it came out at 22ppm?