You cannot backwash a cartridge pool filter; they are not designed for backwashing. Unlike sand filters, cartridge filters lack the necessary reverse water flow function and a backwash line. Therefore, you must clean them manually.
Understanding Cartridge Filter Cleaning
Cartridge pool filters are efficient at removing debris but require regular manual cleaning because they cannot be backwashed. Here’s what you need to know:
- No Backwash Feature: Cartridge filters do not have a backwash valve or the plumbing to reverse the water flow. This design difference means you must remove the cartridge and clean it by hand.
- Manual Cleaning: The manual cleaning process involves removing the filter cartridge, rinsing it thoroughly with a hose, and sometimes using a cleaning solution for a deeper clean.
Step-by-Step Guide to Cleaning a Cartridge Filter
Here’s a simple process to follow to maintain your cartridge pool filter:
- Turn Off the Pump: Always turn off your pool pump before starting any maintenance to avoid damage or injury.
- Release Pressure: Open the air relief valve on top of the filter housing to release any trapped air and pressure.
- Open the Filter Housing: Carefully open the filter housing following the manufacturer’s instructions. Usually, this involves unscrewing or releasing clamps.
- Remove the Cartridge: Gently remove the cartridge from the housing. Be careful not to tear or damage the filter material.
- Rinse the Cartridge: Use a garden hose with a spray nozzle to rinse the cartridge thoroughly. Spray from the top downwards, working your way around to remove debris.
- For stubborn dirt: Consider using a filter cleaning solution, following the product's guidelines.
- Do not use a pressure washer: High pressure can damage the filter material.
- Clean the Filter Housing: While the cartridge is out, rinse the inside of the filter housing to remove any settled dirt or debris.
- Reinstall the Cartridge: Place the cleaned cartridge back into the housing, ensuring it is properly seated.
- Close the Filter Housing: Secure the filter housing lid or clamps tightly.
- Turn the Pump Back On: Turn the pump back on and check for leaks.
- Bleed the Air: Open the air relief valve to let any trapped air escape and then close it once water begins to trickle out.
When to Clean Your Cartridge Filter
- Regularly: Clean your cartridge filter every two to four weeks, depending on your pool's usage and the environment.
- Pressure Gauge: If your filter has a pressure gauge, clean the cartridge when the pressure rises 8-10 PSI (pounds per square inch) above the clean starting pressure.
- Cloudy Water: A cloudy pool could indicate it's time to clean your filter.
Why Manual Cleaning is Necessary
As the reference clearly states, cartridge filters are not designed for backwashing because they do not have a reverse water flow system. Instead, these filters are built to trap debris within their pleated material. Regular, manual cleaning of the filter is crucial for its efficiency and lifespan.
| Feature | Sand Filter | Cartridge Filter |
|---|---|---|
| Backwash | Yes | No |
| Cleaning Method | Backwashing | Manual Rinsing |
| Backwash Line | Present | Absent |
