Universal OEM Coarse Thread Spa Cartridge Filter - 50ft² Filter Element - Signature / Waterway / Sapphire Widemouth
Not sure this filter fits? Launch our Filter Cartridge Finder Here — search by length, diameter, end-cap type, hole size and thread or spigot size to confirm the match.
Delivery and Shipping Info*
Delivery and Shipping Info*
*Free, Flat Rate & Express Post Shipping Information. Calculated at checkout.
Choose Express Post for fastest shipping!
Universal OEM Coarse Thread Spa Cartridge Filter - 50ft² Filter Ele...
OEM 50ft² Coarse-Thread Screw-In Spa Filter Cartridge. One of the most commonly used spa filters found in portable spas since the early 2000s. This semi-universal coarse-thread filter is widely used across many Australian spa brands and models, including Sapphire, Signature, Halo, Spa Industries, and many others.
Commonly 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, Quatro, SpaPro, Stylus, Timeless, and many spas using Waterway Wide Mouth, CMP Widemouth, and WWDG style filters.
This is a high-quality OEM coarse-thread filter cartridge made with premium USA filter media from Darlly / Reemay. We buy these in bulk directly from the manufacturer and pass the savings on to you. This is not a low-grade generic filter. It is a proven replacement used across a huge range of spas.
Important: Spa manufacturers can change filter types between models and production years. Always compare your existing filter measurements, thread type, and handle style before ordering.
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 band is part of the filter and is not removable.
Why Choose This Filter?
- OEM quality for reliable fit, performance, and lifespan.
- Premium USA filter media from Darlly / Reemay.
- Bulk direct-from-manufacturer supply for better value.
- Physically in stock for pickup or fast shipping.
- Widely used and proven in spas for over two decades.
For best water quality and performance, spa filters should generally be replaced every 1 to 2 years, depending on use and water conditions.
Specifications
- Filter Area: 50ft²
- Length: Approx. 205mm (older versions were commonly 205mm to 225mm)
- Diameter: Approx. 145mm to 150mm
- Thread Diameter: Approx. 47mm to 49mm ACME coarse thread
- Thread Length: Approx. 17mm
- Top: Closed with D-shape or square handle
- Material Options: Standard white or Microban® (blue) antimicrobial filter material
Common Part Numbers Replaced
This filter replaces a wide range of part numbers from brands including Pleatco, Unicel, Filbur, Darlly, Magnum, and others.
Examples include:
109013, 125067, Pleatco PWW50P3, Unicel 6CH-940, Filbur FC-0359, Darlly 60401, 03FIL1400, 817-0050, PWW50, WY45, RFILA 1525B, RFILA15025, RFILA15050, RFIL150505, FCD226, 4504RS, RFILA1525B, AFILK2525F, WW50S, MWY45, SG50, FC-FCD226, FC-FCD236, SS50, RFILWAT50T, I500105059, 417526538-880845745, 8664755738148 and others.
Please note: RFILA15025 kit is now supplied as 2 x RFILA15050.
Popular Spa Models This Filter Fits
Please ensure you compare thread style, thread dimensions, and images on this listing.
Aquapulse: Avalon, Reef, Manly, Bronte, Emerald, Hamilton, Stradbroke. Most models except Trinity and Eden. Part No: 125067 - Universal Paper Cartridge Filter 228mm x 147mm x D Handle x 47mm Coarse Male Thread Outer Diameter
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 -- Almost all filters with Twin Filters that load from the front and have coarse thread.
Getaway: Anglesea, Aspen, Bondi, Cinema, Coolum, Fairhaven, Flinders, Glenelg, Hayman, Jan Juc, 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 models)
Oasis: Pacific Hydro
Sapphire: Most models -- Almost all filters with Twin Filters that load from the front and have coarse thread.
Signature: Big Sir, Miami, Millennium, President, V-Stream -- Almost all filters with Twin Filters that load from the front and have coarse thread.
Spa Industries: Fiji, Mercury, Maui, Grand, Titan, Heat, Hydro -- Almost all filters with Twin Filters that load from the front and have coarse thread.
Bunnings: Mandalay Bay, Venetian
Poolwerx: Motion
Spas For Life: Relaxer
This semi-universal spa filter cartridge offers reliable performance, broad compatibility, and proven long-term use, making it a trusted replacement for 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.
FC-FCD226/SS50
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.