Quick Answer
LOW FLOW FROM A REVERSE OSMOSIS UNIT: Common causes include membrane fouling, high feed water pressure, and inadequate pre-treatment. Insufficient water pressure can also lead to poor flow rates. Check the unit's maintenance log and consult the user manual for troubleshooting guidelines.
Checking Pre-Treatment
Pre-treatment is essential for a reverse osmosis (RO) unit’s performance. Check the sediment filter for clogs or blockages, and replace it if necessary. Typically, a sediment filter should be replaced every 6-12 months or when the flow rate drops significantly. Use a filter wrench to remove the old filter and replace it with a new one. Make sure to install the new filter in the correct direction to avoid damaging the unit.
Inspecting the Membrane
The reverse osmosis membrane is a critical component that can become fouled or clogged due to high TDS (total dissolved solids) levels, bacterial growth, or chemical contamination. Check the membrane for any signs of damage, such as tears or pinholes. Use a membrane cleaning solution and follow the manufacturer’s instructions to clean the membrane. If the membrane is damaged, replace it with a new one.
Monitoring Feed Water Pressure
Feed water pressure is another crucial factor that can affect the RO unit’s performance. Check the feed water pressure gauge to ensure it is within the recommended range (usually 40-60 psi). If the pressure is too low, adjust the shut-off valves or consider installing a booster pump to increase the pressure. This will help maintain optimal flow rates and prevent membrane damage.
Find more answers
Browse the full Q&A library by topic, or jump back to the topic this question belongs to.