meter are you using? the x10 seems odd to me. It's normal to read a few hundred, not a few thousand.
Also, you'll need to let a brand new RODI
unit run for a bit to get everything down to 0 TDS
. I think I let mine run for an hour or two before ever collecting the water.
As for the waste water, it depends slightly on the RO
membrane you have, but in general you're going to get 4:1 waste:pure water. Lower water pressure (like you have) makes it even worse actually. Higher water pressure will make the RO
membrane operate better. So, you can consider buying a booster pump. Ideally (again, unit specific) you probably want to be in the 85psi range.