RO Membrane Flow Calculator

Use this interactive calculator to determine flow rates and pressure drops for your reverse osmosis system using 4040 membranes. Adjust the feed water flow rate, number of membranes, and recovery rate to see how they affect your system's performance.

Recommended: 3-16 GPM per membrane

Each membrane adds 15% recovery from remaining feed water

0%0%70%
Fresh Feed
10 GPM
Actual Feed
0.0 GPM
Total Permeate
0.0 GPM
Final Concentrate
0.0 GPM
Recycle Flow
0.0 GPM
Total Recovery Rate
0.0%
Pressure Drop
0.0 PSI

Tank Fill Time Calculator

Fill Time Estimates

Tank SizePermeate RateFill Time
300 gallons0.0 GPM0 minutes

Understanding Your Results

Key Terms

  • Feed Water Flow Rate: The total water flow entering your RO system (GPM)
  • Permeate Flow: The purified water output from your system (GPM)
  • Concentrate Flow: The waste water containing rejected contaminants (GPM)
  • Recovery Rate: The percentage of feed water converted to permeate

System Considerations

When designing your RO system, consider these important factors:

  • Higher recovery rates may increase scaling potential
  • Multiple membranes increase system pressure requirements
  • Proper pretreatment is essential for membrane longevity

Need Help Sizing Your System?

Our experts can help you design the perfect RO system for your needs, taking into account your water quality, flow requirements, and space constraints.