Darlly Spa Pool Replacement Filter Cartridge 40508U PWW50L Replaces 817-4050 2 Inch Bottom SAE Thread

Keep spa and pool water crystal clear with the Darlly Spa/Pool Replacement Filter Cartridge, model 40508U / PWW50L. Engineered for reliable performance, this cartridge fits a wide range of filtration systems and delivers dependable, high-capacity filtration for everyday use and after-heavy-use weekends alike.

Key compatibility and fit

• Replaces OEM numbers: 13079, 817-4050, 817-4050-IW, APCC7644, PLE-051-9192, PWW50L
• Application: Spa and pool filtration systems, including installations labelled Rising Dragon and Waterway Bottom-style assemblies
• Dimensions: Diameter 4-15/16", Length 13-1/2"
• Bottom/Top design: Bottom style with SAE female thread; Top style with a convenient handle for easy removal
• Media and filtration area: 3 oz filtration media, delivering a 50 sq ft filtering surface (TeleWeir design)

Why this Darlly cartridge stands out

• Efficient TeleWeir design maximizes surface area and smooth flow, helping capture fine debris while maintaining steady water flow.
• High-capacity filtration with 50 sq ft of media to help keep spa and pool water clearer for longer between cleanings.
• Reliable compatibility with a broad set of replacement numbers ensures you can source a trusted cartridge without guesswork.
• Durable construction designed to withstand regular spa and pool use, delivering consistent filtration performance over time.

What problems this solves

• Reduces cloudiness by trapping small particulates before they circulate back into the water.
• Protects your pump and heater by preventing debris buildup in the filtration housing.
• Provides straightforward installation with a top handle for quick replacements and minimal downtime.

Best-use scenarios

Ideal for homeowners who maintain spas, hot tubs, or small-to-mid-size pools that require a 4-15/16" diameter cartridge. The 13-1/2" length and compatible bottom/top configurations fit many standard housings, making this a versatile choice for seasonal maintenance or regular upkeep.

Installation and maintenance tips

• Power off the system before removing the existing cartridge. Remove the old cartridge and rinse the new one under clean water to remove any packaging residue.
• Install with the handle on top for easy future removal. Ensure the bottom SAE threads engage properly for a secure seal.
• Rinse the cartridge periodically between replacements to remove surface debris and maintain optimal flow.
• Replace when you notice diminished flow or after extended use; using the correct replacement helps preserve water clarity and equipment efficiency.

Choose the Darlly 40508U / PWW50L replacement cartridge for a dependable, high-capacity filtration solution that aligns with your spa or pool’s needs, keeps water clear, and makes maintenance straightforward.