How to Clean a Cartridge Pool Filter

Rinse the filter with a hose, soak it in a cleaning solution, and rinse again before reinstalling. Try our AquaDoc Cartridge Cleaner Spray for effective results.

How Often Should You Clean a Cartridge Pool Filter?

The frequency of cleaning depends on how often you use your pool and the amount of debris it collects. General guidelines include:

• Every 2 to 6 weeks during peak swimming season
  

• When the pressure gauge reads 8-10 psi higher than the clean baseline
  

• After heavy storms or excessive debris buildup
  

• At the start and end of the swimming season
  

A clean filter helps your pump run efficiently and reduces strain on your system. If your pool gets cloudy or circulation weakens, your filter may need attention.

Supplies Needed for Cleaning a Cartridge Filter

Gather these tools before you start:

• Garden hose with spray nozzle: For rinsing off debris
  

• Large bucket or trash can: For soaking the filter
  

• Filter cleaner solution or diluted muriatic acid: To break down oils and calcium buildup
  

• Soft brush: To gently scrub stubborn dirt
  

• Rubber gloves and safety goggles: For handling chemicals
  

• Replacement cartridge (if needed): In case the filter is worn out
  

Having the right supplies makes cleaning more effective and protects the filter from damage.

Step-by-Step Guide to Cleaning a Cartridge Pool Filter

Step 1: Turn Off the Pool System

Before removing the cartridge, turn off the pool pump and filter system. This prevents water from flowing while the filter is out.

Step 2: Release Air Pressure

Most pool filters have an air relief valve on top. Open the valve to release trapped air and avoid water spraying when opening the filter housing.

Step 3: Remove the Cartridge

Open the filter housing according to the manufacturer’s instructions. Carefully lift out the cartridge and inspect it for visible debris, dirt, and damage.

Step 4: Rinse Off Loose Debris

Use a garden hose with a spray nozzle to rinse dirt from the pleats. Spray at an angle from top to bottom, working around the entire cartridge. Avoid using high-pressure washers, as they can damage the pleats.

Step 5: Soak the Filter for Deep Cleaning

For stubborn oils, minerals, and debris, soak the cartridge in a filter cleaning solution. If calcium buildup is an issue, use diluted muriatic acid (1 part acid to 10 parts water). Let the filter soak for at least 6 to 12 hours.

After soaking, rinse the cartridge thoroughly to remove all cleaning residue.

Step 6: Inspect for Damage

Check for cracks, torn pleats, or excessive wear. If the filter is damaged, replace it to maintain proper filtration.

Step 7: Reassemble and Restart the System

Place the cleaned filter back into the housing, secure the lid, and close the air relief valve. Turn the pump back on and monitor the pressure gauge. If the pressure remains high, the filter may need additional cleaning or replacement.

Tips for Maintaining Your Cartridge Filter

• Rinse weekly to prevent heavy buildup.
  

• Use enzyme treatments to break down oils and lotions.
  

• Monitor water chemistry to reduce excess debris.
  

• Rotate two cartridges for longer lifespan and less downtime.
  

Regular maintenance extends the life of your filter and keeps your pool water clean all season long.