How to Clean a Pentair Filter Cartridge: Step-by-Step Guide
Keeping your Pentair filter in top shape isn’t just good for your pool—it extends the life of your system and saves energy in the long run. This guide walks you through everything you need for Pentair cartridge maintenance, including the right tools, products, and simple steps to clean it properly.
Why Clean Your Pentair Filter Cartridge?
A clean Pentair filter ensures:
- Better water clarity
- Efficient water circulation
- Reduced strain on your pool pump
- Longer lifespan for your pool equipment
If your pressure gauge reads 8-10 PSI higher than normal, or the water flow slows down noticeably, it’s time for a cleaning.
What You’ll Need
Before getting started, gather these supplies:
| Item | Purpose | Recommended Product |
|---|---|---|
| Garden hose with spray nozzle | Rinse debris off cartridge | Any multi-pattern nozzle |
| Cartridge cleaning solution | Break down oils and scale | Leisure Time Filter Clean or Natural Chemistry Filter Cleaner |
| 5-gallon bucket or trash bin | Soak the cartridge | Plastic with lid preferred |
| Rubber gloves | Protect hands from chemicals | Latex or nitrile |
Step-by-Step: How to Clean a Pentair Filter Cartridge
Step 1: Turn Off Your Pool System
Cut power to the pump and filter. This prevents water flow while you're disassembling the unit.
Step 2: Release Pressure
Open the air relief valve on the top of your filter tank to let out any built-up pressure.
Step 3: Remove the Cartridge
Undo the filter clamp or bolts, then lift the lid. Carefully take out the filter cartridge. If it's stuck, gently wiggle it loose.
Step 4: Rinse the Cartridge
Use a spray nozzle to rinse from top to bottom. Focus on each pleat to clear dirt and debris.
Step 5: Soak the Cartridge
Mix the cleaning solution with water in a large bucket or bin. Let the cartridge soak for 12–24 hours. This breaks down oils, sunscreen, and mineral deposits.
Pro tip:
If you're in a pinch, use a quick spray-on filter cleaner and let it sit for 15 minutes before rinsing.
Step 6: Rinse Thoroughly
After soaking, rinse the filter again to flush out any leftover cleaner and debris.
Step 7: Inspect and Reinstall
Check the filter for any tears or cracks. If it's intact, put it back into the housing. Tighten the lid and clamp securely.
Step 8: Restart and Check Pressure
Power the system back on. Watch the pressure gauge and make sure it's back to normal.
How Often Should You Clean It?
Clean your Pentair filter cartridge every:
- 6 weeks for pools with heavy use
- 8–12 weeks for average usage
- At least once a season for spas or light usage pools
Always follow your model’s manual for specific timing.
When to Replace Instead of Clean
Signs It’s Time to Replace Your Cartridge:
- Visible cracks or tears
- Cartridge stays dirty even after soaking
- Water pressure remains high after cleaning
Explore replacement options on our Pool Filters collection, including a full range of Pentair filter cartridges.
Where to Buy Pentair Filters & Parts
Check out the best filter replacements and filter parts here:
Avoid Costly Repairs
Regular Pentair cartridge maintenance helps avoid costly repairs and keeps your water crystal clear. A good rinse, the right cleaning product, and a few minutes every couple of months go a long way. If you're unsure which replacement filter fits your model, or need help choosing the right cleaning product, our team is always ready to help.
Other helpful resources:
How to Prime a Pentair Pool Pump & Fix High Pool Filter Pressure
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