[Poles R Us]

amount TDS you would allow going into tank before DI, im getting it down to 009 from about 350 340

[richard jagger]

Your TDS should not be higher that 10% of your starting tds in your case 35. if its less, you are doing well .You can reduce the waste pressure and produce more pure or you can leave the waste and save on resin.If your tds moves above 35,its time for new membranes.Hope that helps.

[DaveG]

we got a brand new merlin..tds in 250 tds out 40