1. Pure Water Production Capacity (L/day, L/Hour, GPD). 2. Feed Water TDS and Raw Water Analysis Report (prevent fouling and scalling problem) 3. Iron and Manganese must be removed before raw water enter reverse osmosis water filtration membrane 4. TSS (Total Suspended Solid) must remove before industrial water purification system’s membrane. 5. SDI (Silt Density Index) must be less than 3 6. Must be sure your water source does not have oil and grease 7. Chlorine must be removed before industrial water treatment system 8. Available electrical power voltage and phase 9. Layout of place for industrial RO reverse osmosis system