yeah thats the one, sounds like a champ housing.
If you are serious about reducing waste water then a pumped twin ro is the way to go.
Our booster pumps will push 17ltr/min @ 80psi, which is different to a 17ltr/min 80psi pump which will only push a fraction of that at 75psi or so. Production rates typically around 550ltrs/hr and recovery is around 85% although lower recovery will improve lifespan of membranes.