[vivaro 013]

my RO GRD200 has been standing for three days. When i started it up this afternoon the TDS meter showed a high level of 12-15 TPM in  the filtered water, within two minutes TPM was at zero. Will this water that was at a high level will it contaminate the rest of the water.

[Clear Vision]

Yes It will contaminate the rest of the water. But If you keep checking the tds readings In your tank you will find that the pure water that goes In will neutralize the bad water that went In and you might get the reading down to 001ppm-005ppm depending on how much poor water went In & how much pure water you are putting In.

Im not very good at explaining things or spelling so I hope that makes sense.

Matthew

[pylofm]

I have to admit I disconnect and let the water run off when I have left it not in use.

Cheers
Dave.

[Tim Morton]

What I do with my 300gpd ro is this, I've noticed the same thing with my ro as you have, when you 1st start it up the tds rise quite high and then settle down a few mins later. I just start it up with the pure feed disconnected and left to go to waste, while the tds settles I fill up my trailer tanks, by the time the trailer's full the tds has settled down to 000-001, so I re-connect the pure feed to my water butts.

I guess I could leave it and the higher tds would be diluted by the lower, but for the sake of a few mins I'd rather keep the tds in the water butts as low as poss and put less tds through my di vessel.

Tim