my buddy just got an aquasafe system,, it is pretty good quality, but the pre filters are not,,
it also comes with an adjustable restrictor valve,,, so you can adjust your wastewater output,, 4:1, 3:1, 1:1,, whatever you want,, and you can do a flush with a turn of a screw then put it back where it was with the setting nut,, super easy ,, i want one,, the adjustable restrictors sell for $13 on aquasafe website
they also sent him the extra drinking water parts,, pressure tank, polishing filter... and i got a remineralization canister, so now have the best drinking water pressurized from a tap on my kitchen counter.. its pretty cool... wife loves it,,, no more complaining about all the water i use...