I was talking to my friend and I have the same unit as him but spent 80 less (and he doesn't even have a TDS meter) so I just wanted to share the good fortune for those who are interested.
I paid $210 for a 100 GPD Barracuda RO/DI unit with wrench, John Guest fittings (I finally figured out...
I just purchased a AquaFX Barracuda 100gph RO/DI unit from and had some questions. First off in many of the pictures there is the white thing connected to the pipe that leads to the 1st stage. On my unit I have a simple valve with a blue handle that is turned 90 degree to close it. Secondly...