My refurb SpectraPure Ro-90 got delivered yesterday. I'm setting it up now. I'm getting 110ml/min. So it's not even on the chart. Do I need to buy a booster unit?
AZDesertRat- I knew you would chime in here! It's only 12" long. I did let it run for over a hour. I got closer to 3:1 ratio. I also did the glass test. 2 of the same glasses. It took 3.5 glasses of waste to make 1. If I call they can turn the water pressure up at my house? That would be awesome! I need better pressure for more then just making RO/DI water. I'm reading about 32psi on my RO/DI.How long is the flow restrictor that is installed?
Did you let the system run for at least an hour before measuring the waste to get the membrane saturated and working correctly?
Measure the waste flow for exacty one minute then do the same with the treated flow for one minute and if it is between 3:1 and 4:1 waste to good you will be OK.
40 psi is about the bare minimum a membrane will work at efficiently and is available in most areas. You might call your water utility and ask what pressure you could expect in your area, they may have closed distribution valves they don't know about or you may have a pressure regulator on your incoming water line that needs adjusting.