Which Replacement Pool Filter Should You Buy? Pleatco vs. Unicel vs. Filbur – and Other Options
When your pool filter cartridge needs replacing, the number of options can feel overwhelming. Among the most popular aftermarket choices are Pleatco, Unicel, and Filbur — three brands trusted by pool owners for years. But those aren’t your only choices. You may also consider the OEM (original equipment manufacturer) cartridge from your filter’s brand or go with generic third-party cartridges that cost much less.
So, which one should you choose? Let’s break down the differences and, more importantly, focus on how to select the right replacement filter for your pool.
Why the Right Filter Cartridge Matters
The cartridge inside your filter housing is what captures oils, dirt, fine debris, and contaminants from your pool water. A high-quality, properly fitting cartridge will:
- Keep your water sparkling clean
- Protect your pump and system from strain
- Reduce chemical usage by improving water balance
- Save time and money by lasting longer and requiring fewer cleanings
On the other hand, a poor-quality or mismatched cartridge can lead to cloudy water, frequent cleaning, and costly replacements.
The Big Three: Pleatco, Unicel, and Filbur
Pleatco
Positioned as a premium aftermarket brand, Pleatco offers advanced fabrics, stronger cores, and upgraded lines such as Pleatco Advanced and Pleatco Advanced Ultra. They are designed for longer life and easier cleaning.
Best for: High-use pools, spas, or pool owners who want fewer cleanings and longer replacement cycles.
Unicel
A reliable, value-focused brand, Unicel uses Reemay® spunbond polyester media for consistent performance. They are widely compatible and a popular choice among service pros.
Best for: Most residential pools that need a balance of cost and quality.
Filbur
Similar to Unicel, Filbur offers dependable and affordable filters. Some models include antimicrobial end caps for added protection.
Best for: Pools that need budget-friendly, reliable performance with specialty features.
Pleatco Advanced and Advanced Ultra
Pleatco has introduced enhanced filter lines for heavy-use conditions:
- Pleatco Advanced: Enhanced fabrics designed for heavy bather loads, oils, and spas; resists clogging and lasts longer.
- Pleatco Advanced Ultra: Features Pure Pleat™ technology to keep pleats rigid and evenly spaced for maximum dirt capture and longer cleaning cycles.
These are premium choices for pool owners who prioritize long lifespan and minimal maintenance. For average backyard pools, however, Unicel or Filbur often deliver excellent results at a lower cost.
Other Options: OEM and Generic Filters
OEM Cartridges (Original Equipment Manufacturer)
OEM cartridges are made by the same company as your filter system (e.g., Pentair, Hayward, Jandy). Their biggest advantage is fit assurance — you select based on your filter’s model number, eliminating the need to measure dimensions.
Pros: Guaranteed fit, strong durability, best for proprietary housings or high-end systems.
Cons: Higher cost, often no significant performance gain in standard residential use.
Generic Third-Party Filters
These are the lowest-cost replacements, often labeled as “compatible with” your filter model.
Pros: Affordable, widely available, suitable for light-use pools.
Cons: Quality varies — some use thinner fabrics, weaker cores, or have poor fit. Choose carefully.
Comparison Table
| Category / Brand | Build Quality & Media | Durability | Price Range | Best Use Case | Key Drawbacks |
|---|---|---|---|---|---|
| OEM Cartridges | Made by original filter manufacturer | Excellent | $$$$ | Proprietary filters, premium systems | High cost |
| Pleatco | Premium fabrics, strong cores, Advanced/Ultra available | Excellent | $$$ | High-use pools, spas | Higher upfront cost |
| Unicel | Reemay® polyester media | Very good | $$ | Most residential pools | Slightly shorter life vs. Pleatco |
| Filbur | Solid build, antimicrobial options | Good–Very good | $$ | Budget-conscious owners | Less durable in heavy use |
| Generic Aftermarket | Quality varies | Variable | $ | Light-use, budget pools | Poor fit or short lifespan risk |
Decision Guide Flowchart
Use this step-by-step guide to decide:
Frequently Asked Questions (FAQ)
How often should I replace my pool filter cartridge?
Typically every 12–24 months, depending on usage, water chemistry, and maintenance habits.
Is an OEM filter always better?
Not always. OEM ensures guaranteed fit but aftermarket brands like Pleatco, Unicel, and Filbur offer comparable performance at a lower cost.
Are cheap generic filters safe to use?
Yes, if they fit properly. However, very low-cost imports may clog quickly or have weak cores. Always check quality.
Which filter is best for spas or hot tubs?
Pleatco Advanced or Advanced Ultra — designed to handle oils, lotions, and heavy bather loads.
How can I extend the life of my cartridge?
Rinse monthly, soak periodically in a cartridge cleaner, and maintain proper water chemistry.
Conclusion
There’s no one-size-fits-all answer when it comes to choosing a replacement filter.
– OEM: Best for guaranteed fit, premium systems, but expensive.
– Pleatco: Great for heavy use and long life.
– Unicel: Balanced option for most homeowners.
– Filbur: Dependable value choice.
– Generic: Budget option, but quality varies.
Whichever you choose, remember: correct fit, proper maintenance, and buying from a trusted supplier matter more than the brand itself.