Part 1: Understanding Your Filter Cartridges
Before replacing the filter cartridges in your Stand Reverse Osmosis Water Purifier, it's essential to understand the types and sequence of cartridges in your system. The standard 5-stage filtration system includes cartridges with specific functions and replacement cycles:
The first stage is the PP cotton filter, designed to remove larger particles such as sediment, rust, and suspended solids from the water, thereby protecting subsequent filters. Replacement is recommended every 3-6 months.
The second stage is the granular activated carbon filter, which adsorbs residual chlorine, unusual colors, and odors, safeguarding the RO membrane. Replace every 6-12 months.
The third stage is typically a compressed activated carbon filter or another PP cotton filter, providing further adsorption of residual chlorine and fine impurities. Replace every 6-12 months.
The fourth stage is the RO reverse osmosis membrane, the core component of the purifier. With a filtration precision of 0.0001 microns, it removes heavy metals, bacteria, viruses, and dissolved organic matter. Replacement is recommended every 2-3 years.
The fifth stage is the post-activated carbon filter, located after the RO membrane, which improves the taste of the purified water and adsorbs any potential odors from the storage tank. Replace annually.
Always consult the product manual or check the specific model number to ensure you purchase the exact replacement cartridges compatible with your Stand Reverse Osmosis Water Purifier.
Part 2: Pre-Replacement Preparation
Required Tools and Materials
Correct model of new filter cartridges
Specialized wrench (usually included)
Towel
Basin of clean water
Gloves (optional)
Preparation Steps
Close the inlet water valve.
Unplug the power cord.
Open the purified water faucet to drain remaining water.
If equipped with a pressure storage tank, open the tank's ball valve and press the flush button to drain residual water.
Part 3: Step-by-Step Replacement Guide
Replacing the First Three Pre-Filters
Use the wrench to turn the filter housing counterclockwise and open it.
Remove the old filter cartridge.
Rinse the inside of the filter housing.
Insert the new filter cartridge, ensuring the end with the O-ring faces up.
Screw the housing back on clockwise and tighten securely.
Replacing the RO Membrane
Disconnect the inlet and outlet tubes, marking them for reinstallation.
Use the specialized wrench to open the RO membrane housing counterclockwise.
Pull the old RO membrane out vertically.
Thoroughly rinse the inside of the membrane housing.
Insert the new RO membrane vertically into the housing, ensuring the end with double O-rings faces down.
Tighten the housing cap clockwise.
Reconnect the inlet and outlet tubes to their correct ports.
Part 4: Post-Replacement Checks and Flushing
Essential Steps
Reopen the inlet water valve and restore power.
Carefully check all connections for leaks.
Perform initial flushing: let the system run with the faucet open for 15-20 minutes, discarding the initial water output.
Reset the filter life indicator light according to your model's instructions.
Part 5: Common Issues and Important Notes
Common Questions & Solutions
No water or weak flow: Check if the inlet valve is fully open and verify the RO membrane is installed correctly. Low initial flow from a new RO membrane may improve after 10-15 minutes of flushing.
High TDS readings: This is normal initially. After 1-2 days of continuous use, the TDS value should decrease to normal levels.
Bubbles or white water: Caused by air in new filters. Let the water sit for a few minutes; it will clear and is safe.
Important Reminders
Always disconnect power before any maintenance.
If problems persist, contact Stand customer service or a qualified technician.
Record the replacement date for each filter to schedule future maintenance.
Use only genuine or compatible replacement cartridges specified for your Stand Reverse Osmosis Water Purifier model.
It is recommended to set reminders in your phone or place a dated label on the unit to ensure timely filter replacements.
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We are a specialized Chinese factory engaged in the production of Stand Reverse Osmosis Water Purifiers. We provide factory-direct supply with wholesale discounts, allowing customers to enjoy cost-effective procurement solutions. Whether for small-volume purchases or large-scale procurement, our supply system can flexibly cater to different order demands, ensuring stable product supply and timely delivery.
