What TDS should I get out of just my RO filter?

1

I am seeing a bunch of numbers in my research. Is it a percentage of the input water’s TDS or a number I should be shooting for once it leaves the RO membrane? I know that after coming out of the DI filter it should be reduced to zero? I have an adjustable ball valve for the waste water and would like to be able to know what I should set it at.

2

TDS out of just RO should be 85% - 90% less than incoming.

3

you can set the waste to be what ever you want really, generally the more water you waste the purer the water should be
It also depends whether you are using a pump, I have 100psi pump after the prefilters and I waste about 6L/min and produce 5Lmin of pure my starting TDS is around the 150-160 out of the RO its down to 005 or less, I don’t even bother running it thru DI

4

Thanks!