How is PH effected by reverse osmosis?

[z-bob]

I need to order that pH meter and stop guessing, don't I?

 

[Buckeye_Hydro]

Greatly affected by net driving pressure. So if you send the RO water to a pressurized storage tank - will likely be less than 10. To an atmospheric tank, and depending upon the membrane you're using, and some other factors, you might see a rejection rate up around 98%