i have 45, looking to buy a booster pump
"copied below info from BRS"
RO/DI System Recommended Conditions: Minimum Water Pressure - 65 PSI Max Water Pressure - 90 PSI Recommended Water Temperature - 77°F Recommended Max TDS - <500ppm Waste to Product Water Ratio - 1.5:1 Water pressure can be increased by adding a booster pump before your RO/DI system.