A 4 Membrane Reverse Osmosis (RO) machine is commonly used for bottled water, sachet water, and industrial water treatment.
Typical capacity:
500–1,000 LPH (liters per hour), depending on:
Feed water TDS
Membrane brand and condition
Operating pressure
Water temperature
For your borehole water with around 150 ppm TDS, a 4 × 4040 system can comfortably produce around 800–1,000 LPH of permeate water when properly designed.