Name: Fil-fresh PRB35-IN Hot Tub Filter Replacement for Filbur FC-2385, Unicel C-4335, ThermoSpa FL1008, Pleatco PRB35-IN, Guardian 409-219, 35 Sq. ft, 2-Pack
Brand: Fil-Fresh
Price: 42.99 USD
Availability: InStock

Fil-fresh PRB35-IN Hot Tub Filter Replacement for Filbur FC-2385, Unicel C-4335, ThermoSpa FL1008, Pleatco PRB35-IN, Guardian 409-219, 35 Sq. ft, 2-Pack

Built to Fit: Compatible with Rainbow Dynamic 35, replaces Filbur FC-2385, Pleatco PRB35-IN, Unicel C-4335, Guardian 409-219, Waterway Plastics 817-3501, Pentair R173431. Filter Dimensions: Length: 9 1/4"; Outside Diameter: 5"; Top & Bottom Openings: 2 1/8"
3X More Effective Filtration: NSF 50 certified and designed with ultrafine particle technology to capture 3× more debris than standard filters, effectively trapping leaves, hair, sand, oily residue, and sediment for crystal-clear water
Built to Last: Features corrosion-resistant end caps that withstand chemicals and harsh conditions without melting or degrading. Reinforced pleated fibers resist deformation, ensuring consistent, reliable performance
Washable & Reusable: The advanced trilobal structure prevents large particles from entering, ensures even debris distribution and prevents clogs—promoting quicker and easier rinsing to reduce cleaning time
Less Frequent Cleaning: The free-flow core allows for better water circulation and reduces clogging, extending the time between cleanings. What once required bi-weekly maintenance now only needs attention once a month

$42.99 USD

Tax included. Shipping calculated at checkout.

Fil-fresh PRB35-IN Hot Tub Filter Replacement for Filbur FC-2385, Unicel C-4335, ThermoSpa FL1008, Pleatco PRB35-IN, Guardian 409-219, 35 Sq. ft, 2-Pack

$42.99 USD

Description Application Specifications Comparisons Reviews

Filter It All Out

Debris
Dirt
Hair
Leaves
Oils

Hot Tub Filter Replacement You Can Trust

Ultrafine-Particle Filtration

Trilobal structure offers 3X more interception efficiency to trap more debris.
Built to Last

● Sturdy End Caps resist chemicals, heat, and impact
● Robust Free-Flow Core provides a stable structure and smooth flow
Durable Pleats

High surface area pleats efficiently captures debris and last longer

Pure Water, Pure Relaxation

Perfect Fit

Designed for a snug, easy install

Crystal-Clear Water

NSF 50 certified, captures 3× more debris for endless enjoyment

Easy Maintenance

Quick monthly clean for long-lasting performance.

Customer Reviews

Sturdy & Cost-Saving

Looks just like the pricier ones. This filter has thicker end caps holding the pleated paper, so it feels sturdier. I am happy with this and will purchase again.

Joseph

Fits Perfectly

Fits perfectly in my spa’s filter holder. The material feels high-quality and holds up well. With a second one included, it’s a great value and handy to have a spare ready. Definitely recommend.

Amelia

Provides Good Filtration & Water Flow

These filters stop lint, dirt, and body oils from harming my hot tub components. I found these filters to work very well in filtering and allowing proper jet flow. Easy to clean and reuse.

Mason

Product Specifications

Brand NameFil-fresh
Item model number‎FFPFPRB35
Item Weight2.66 pounds
Product Dimensions9 1/4" L × 5" OD × 2 1/8" ID
Compatible withRainbow/Pentair Dynamic 35, Waterway 35 In-Line
Replacement forPleatco PRB35-IN, Unicel C-4335, Filbur FC-2385, Guardian 409-219, Waterway Plastics 817-3501, Aladdin 13501, SD-00198, Magnum RD35, Baleen AK-3015, Darlly 40353
Package Includes2
Filtration Area35 sq.ft

Fil-fresh PRB35-IN Hot Tub Filter Replacement for Filbur FC-2385, Unicel C-4335, ThermoSpa FL1008, Pleatco PRB35-IN, Guardian 409-219, 35 Sq. ft, 2-Pack

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Fil-fresh PRB35-IN Hot Tub Filter Replacement for Filbur FC-2385, Unicel C-4335, ThermoSpa FL1008, Pleatco PRB35-IN, Guardian 409-219, 35 Sq. ft, 2-Pack

Fil-fresh PRB35-IN Hot Tub Filter Replacement for Filbur FC-2385, Unicel C-4335, ThermoSpa FL1008, Pleatco PRB35-IN, Guardian 409-219, 35 Sq. ft, 2-Pack

3X More Efficient Filtration

Filter It All Out

Hot Tub Filter Replacement You Can Trust

Ultrafine-Particle Filtration

Built to Last

Durable Pleats

Customer Reviews

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