Hey everyone, I have an old MPDI-90 Spectrapure unit with a Madcap Add-On. I haven't used this thing for several years, so I let it run and noticed that the gauge was staying at 0 kPa. I'm assuming my sediment filter is clogged, or the gauge is broken. The sediment filter is dirty so that could be the reason the gauge is reading zero. After I let it run for approximately 15 minutes, then I put some processed water into a cup to test it with my handheld TDS meter and the results were 3 ppm. So what do you guys think I should do to get it to zero? I already ordered a new sediment/carbon filter. Do you guys think I should get a new Silicabuster Di Cartridge and MaxCap Super DI cartridge? Also, do the cartridges specifically have to be from spectrapure? or can I use any replacement DI? Please let me know if you guys need more information.
Note: I have never replaced anything on this RO/DI unit in my life. My tap water tested at 116 ppm
Note: I have never replaced anything on this RO/DI unit in my life. My tap water tested at 116 ppm