Unicel K-40515-B 10" x 4.5" Pleated 5 Micron Polyester Filter
Best reusable filter for pool owners seeking efficient, eco-friendly water maintenance.
Enhance your pool or spa's water quality with the Unicel K-40515-B filter. This 10-inch pleated polyester cartridge offers a 5-micron nominal filtration rating, effectively removing impurities. Designed for durability and sustainability, it's washable and reusable, providing an eco-friendly solution. Its synthetic media resists bacterial growth, and the pleated design maximizes surface area for high flow rates and excellent dirt-holding capacity, all while minimizing pressure drop. Crafted from chemical-resistant polyester, this filter ensures reliable performance and longevity for your water system.
$34.99
Owner Satisfaction
4.7
/ 5
Category Rank
3
/ 1440
#3 in Pool & Spa Filters
Price vs Category Average
-78%
Below average
Filter Media
Chemical resistant Polyester
/ Chemical resistant Polyester
Who it's for
- Homeowners seeking high-volume water filtration and extended service intervals
- Budget-conscious users prioritizing long-term savings through reusable filter components
- Families requiring crystal-clear water free from fine sediment and rust
Who should skip it
- Busy individuals preferring the convenience of disposable, low-maintenance filter cartridges
- Residents in areas with heavy sediment loads prone to pressure drops
- Users unable to commit to the frequent maintenance required for sanitation
Performance breakdown
Filtration Precision
Five-micron rating effectively captures fine debris for crystal clear water.
Maintenance Efficiency
Washable polyester construction makes routine cleaning simple and highly effective.
Flow Capacity
Pleated design maintains steady water circulation without significant pressure loss.
Material Durability
Chemical-resistant synthetic media stands up to harsh pool treatment environments.
Sustainability Impact
Reusable design significantly reduces waste compared to standard disposable cartridges.
Dirt Holding Capacity
Extended surface area allows for longer intervals between necessary cleanings.
Key Specs
Filter Media
Chemical resistant Polyester
Micron Rating
5 micron nominal
Dimensions
10" Length x 4 5/8" Diameter
Maximum Flow Rate
10 GPM per 10"
Material
#1 Grade Polyester (Cellulose free)
Model / Part #
K-40515-B
Reusable
Yes
Filter Type
Cartridge
Features
- Washable and reusable for long-term use
- Synthetic media resists bacteria growth
- Increased surface area for better flow
- Nominal 5 micron filtration rating
- Free of binders and additives
- Eco-friendly filtration option
- High dirt loading capacity
- Lower pressure drop performance
What customers say
Customers overwhelmingly praise this filter for its exceptional value and superior quality. The robust polyester material effectively removes sediment, delivering noticeably cleaner water than standard alternatives. A key benefit is the filter's longevity; users report being able to clean and reuse the material multiple times, significantly extending its service life and saving replacement costs. The precise dimensions guarantee a perfect, leak-free fit, eliminating installation issues common with other aftermarket parts. This product successfully balances high filtration efficiency with economic sense. It is viewed as a reliable workhorse that offers OEM level performance without the premium price, earning strong recommendations for durability and long term savings.
Know before you buy
Because this filter is made of durable, chemical-resistant polyester, you can clean it by rinsing the pleats thoroughly with a garden hose. For deeper cleaning, you can use a specialized filter cleaner to remove oils and stubborn debris before rinsing again.
A 5-micron rating indicates the size of particles the filter can trap. It is highly effective at capturing fine sediment, sand, and small debris, resulting in clearer water compared to filters with higher micron ratings.
This cartridge measures 10 inches in length and 4.5 inches in diameter. Before purchasing, verify that your current filter housing is designed to accommodate these standard dimensions.
Yes, the pleated design maximizes surface area, which allows for a flow rate of up to 10 GPM. This structure helps maintain high water flow while minimizing pressure drop across the system.
Filters containing cellulose can be prone to bacterial growth and degradation when exposed to moisture over time. By using #1 grade synthetic polyester, this filter resists bacterial buildup and maintains its structural integrity much longer.
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$35