Quick Answer
A slow flow rate in your Reverse Osmosis (RO) system can be caused by a clogged membrane, high total dissolved solids (TDS) in the water, or inadequate pre-filtration.
Common Causes of Slow Flow Rate
If your RO system has a slow flow rate, it’s essential to investigate the causes. Check the TDS level in your feed water, which is typically measured in parts per million (ppm). If the TDS level is above 500 ppm, it can clog the RO membrane, significantly reducing the flow rate. In such cases, you may need to install a pre-filter with a TDS level of 100 ppm or lower.
Effect of Clogged Membranes
A clogged RO membrane can also cause a slow flow rate. The membrane is designed to filter out impurities, but over time, it can become clogged with debris, sediment, and other contaminants. This clogging can be accelerated by high TDS levels, poor pre-filtration, or inadequate maintenance. Regularly cleaning or replacing the membrane, as recommended by the manufacturer, can help resolve this issue.
Optimizing System Performance
To optimize the performance of your RO system, ensure that the pre-filter is rated for a flow rate that matches or exceeds the RO system’s capacity. Typically, a 5-micron sediment filter or a 1-micron carbon filter can provide adequate pre-filtration for most RO systems. Additionally, check the RO system’s pressure gauge to ensure that the pressure is within the recommended range. If the pressure is too low, the flow rate may be reduced.
Find more answers
Browse the full Q&A library by topic, or jump back to the topic this question belongs to.