I had a very low pressure situation that I thought this would address. Since it was outside I figured a booster designed for constant use would be fine.
The installation instructions were straight forward and easy to understand and install. (the Evo RO is super easy to install). However in my initial installation the pressure was too low to kick the motor on (there is an adjustable "screw"=nut but that didn't seem to do anything helpful).
No returns once water has gone through the pump so I'm out of look. So I tried another scenario where PSI was normal (like 40-60). the RO Pressure gauge showed 40-60 and when I hooked up the pump This LOWERS! the psi at the Evolution RO down to 20! It also would turn on for a second and then off (as if the high psi would shut it off). I can't use it any scenario it seems. Do NOT spend your money on this expensive of equipment from.