OEM Coarse Thread Spa Cartridge Filter - 50ft² Filter Element - FCD226 Widemouth - Darlly
Product is backordered and will ship as soon as it is back in stock.
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Product is backordered and will ship as soon as it is back in stock.
Semi-Universal OEM Coarse-Threaded Screw In Spa Filter Cartridge – 50ft². The most commonly used filters found in spas since the early 2000s. This is not a cheap Chinese filter found elsewhere. We buy these by the thousands, and pass on the savings to you!
Used in Aquapulse, Bunnings, Cyclone, Designer, Eclipse, Endless®, Escape, Fisher, Getaway, H2O, Heritage, Impact, Lanark, Leisurerite, Lifestyle, Maax, Oasis, Palm Springs, Poolwerx, Sapphire, Signature, Spas Direct, Spa Industries, Spas For Life, SpaPro, Stylus, Timeless, and Waterway Wide Mouth, CMP Widemouth, WWDG, and many more.
Note: As of 2026 these may have a reinforcement band around the centre of the pleats to help prevent individual pleats from sticking together. This is not removable.
Why Choose This Filter?
- OEM quality – not cheap eBay/Amazon imitations. Used by Sapphire Spas and other premium spa brands.
- Bulk direct-from-manufacturer supply – better value passed on to you.
- Physically in stock – available for pickup or fast shipping.
- Trusted performance – widely used for over two decades.
This is a high-quality OEM coarse-thread filter cartridge made with premium USA-made filter media from Darlly / Reemay, and are compatible with many spa brands.
Filters should be replaced every 1-2 years for best results and performance.
Specifications
- Length: ~205mm (previously 205–225mm). New version fits a wider range of spas.
- Diameter: 145–150mm
- Thread Diameter: 47–49mm ACME Coarse Thread
- Thread Length: ~17mm
- Top: Closed – D-Shape or Square Handle
- Material Options: Standard white or Microban® (blue) antimicrobial filter material
This filter replaces many part numbers from trusted brands including Pleatco, Unicel, Filbur, Darlly, Magnum, American Spas, Apollo, Arcadia, Viking, and more.
Examples of part numbers replaced:
109013, Pleatco PWW50P3, Unicel 6CH-940, Filbur FC-0359, Darlly 60401, 03FIL1400, 817-0050, PWW50, WY45, RFILA15025, RFILA15050, RFIL150505, FCD226, 4504RS, RFILA1525B, AFILK2525F, WW50S, MWY45, SG50, FC-FCD226, FC-FCD236, SS50, RFILWAT50T, I500105059, 417526538-880845745, 8664755738148 and others. RFILA15025 – Kit is now 2 x RFILA15050
Popular Spa Models This Filter Fits:
Aquapulse: Avalon, Reef, Manly, Bronte, Emerald, Hamilton, Stradbroke - Most models (except Trinity & Eden)
Cyclone: Breeze, Force, Monsoon, Storm, Tempest, Tornado, Twister, Typhoon, Whirlwind, Zephyr
Endless® Spas: Universe, Baby Grande, Innovator, Extraordinaire, Grande, Ultima, Jewel, Recharger, Vision, Raptor, Hawk (previously known as Mirage), Sabre, Hornet, The Super Endless Swim Spa, The Swimming Machine Recliner, and the current model of the Relaxer from 2006.
Eclipse: Tempest, Twister, Zephyr series
Designer: Atlantic, Azure, Cascade, Colorado, Lagoon, Milan, Regatta, Riviera, Tasman, Titan, Trinity, X-Stream
Getaway: Anglesea, Aspen, Bondi, Cinema, Coolum,, Fairhaven, Flinders, Glenelg, Hayman, JanJuc, Kirra, Lindeman, Long Island , Lorne, Manly, Noosa, Portsea, Sorrento, Torquay, Whistler, Whitehaven.
Heritage: Apollo, Recliner, Regency, Rio, Riverside
Lanark: Atlantic Swim Spa, Byron Bay, Cantwell Bay, Corio Bay, Coronet Bay, Crystal Bay, Diamond Bay, Jarvis Bay, Pacific Swim Spa, Pearl Bay, Summer Bay, Victoria Bay, Waratah Bay
Leisurerite: Aztec, Elite Octagon, Manhattan, Sahara, Swim Stream, Venetian (most pre-2019)
Oasis: Pacific Hydro
Sapphire: Most models
Signature: Big Sir, Miami, Millennium, President, V-Stream
Spa Industries: Fiji, Mercury, Maui, Grand, Titan, Heat, Hydro
Bunnings: Mandalay Bay, Venetian
Poolwerx: Motion
Spas For Life: Relaxer
This semi-universal filter cartridge offers reliable performance, a long lifespan, and broad compatibility, making it a trusted replacement in tens of thousands of spas across Australia and beyond.
Premium Quality. Trusted Brands. No Gimmicks.
Heater & Spa Parts only supplies premium-grade cartridge filters. Unless otherwise stated, our filters are Magnum® or Darlly® branded, made using USA-made Reemay®, Darlly®, Pleatco® filter media or equivalent. These two companies are among the biggest OEM suppliers to major spa and pool manufacturers, including Astralpool and many others.
Because we buy in container-load volumes, we can offer premium filters at sharper pricing and pass that value on to you.
Our filters are trusted across the industry, including by brands such as Astralpool, Balboa, Davey, Emaux, Halo Spas, Hurlcon, Madimack, Oasis Spas, Sapphire Spas, Spa World, Vortex®, SpaNet, Waterco, Zodiac, and more.
FYI, Most major manufacturers do not make cartridge elements themselves. They are supplied by OEM specialists like Magnum and Darlly, using Reemay or Darlly material, which are the same brands we supply.
These are not the cheap, unknown generics commonly sold on eBay, Wish, Temu, Amazon, and others. They are the same type of filters used by top manufacturers.
NSF® certified materials
All our filters are made from NSF® certified materials, meeting international standards for safety, strength, and filtration performance. Brands like Darlly®, Magnum®, Pleatco®, and Reemay® are globally recognised for consistent quality.
Why we mostly use Darlly® and Magnum®
Darlly® and Magnum® filters (with Reemay® or equivalent media) are chosen for real-world reliability:
- Stronger, continuous fibres for minimal shedding
- Greater durability compared to low-grade alternatives
- Longer service life and fewer replacements
- Cleaner, healthier water
Low-quality filters can shed fibres that clog or damage equipment. Ours are engineered to reduce shedding and keep your system running clean and efficient.
Filter cleaning guide
Clean your filter when:
- Spas: water flow or jet pressure drops
- Pools: filter pressure is about 35-45 kPa above normal
How to clean:
- Remove the cartridge as per your manufacturer’s instructions.
- Soak in a proper filter cleaning solution (for example Zodiac Filter Soak or Filter Klenz).
- Rinse thoroughly with a garden hose. A pleat-cleaning nozzle helps.
- Reinstall carefully and check seals are seated correctly.
Maximise filter life:
- Maintain balanced water chemistry.
- Clean regularly based on usage.
- Do not scrub with hard brushes or use high-pressure hoses.
- Avoid flocculants and avoid overusing clarifiers.
- Rotate multiple cartridges where possible to extend lifespan.
When to replace your filter
We recommend replacing cartridge filters every 12 to 24 months, depending on usage and conditions. Keeping a spare on hand allows easy rotation and uninterrupted filtration.
Warranty information
All standard filters are covered by a 12-month replacement warranty (excluding disposable and inflatable-spa types). This covers defects in materials or workmanship, not damage caused by improper use or poor water chemistry. See examples and warranty terms on our warranty page.
Summary: why choose our filters
- NSF® certified materials for proven safety and performance
- Trusted by major brands across the industry
- Mostly Magnum® or Darlly® branded filters, using Reemay® media or equivalent
- No gimmicks, just reliable, proven filtration
- Premium quality at sharp pricing through container-volume purchasing
Your spa or pool deserves more than a “just good enough” filter. Choose proven quality, backed by trusted names and genuine product knowledge.
Measuring a cartridge filter element when you dont have the exact model is the best way to identify it. There are a few important measurements, and they need to be as accurate as possible.
Total Length: Length of the filter, excluding the handle. You can generally also exclude the spigot or thread.
Diameter: This is the width of the filter.
Spigot Diameter: You may have a male threaded, or non-threaded spigot to locate the filter.
Hole Diameter: If you have a hole, rather than a spigot, measure the diameter of the hole.
Thread / Hole Type: Generally these can be a hole, a fine thread, course thread, or camlock style fitting.
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