My company has purchased Aquaboss RO's for use in a new hospital. The label on the last pressure gauge says 20-35 PSI. There is no way I will have that much pressure after two carbon tanks, the narrow tubing Fresenius uses now and two filters.

How much pressure do you really need to operate the Aquaboss?

Mine runs about 25 to 30 psi and 14 to 15 psi when filling. I do not have any alarms so I guess that works. As long as your break tank fills before it cycles you shouldn't have any problems. If you do, Lauer sells a pump for that.