Description
Discover the Darlly 40508U Spa/Pool Replacement Filter Cartridge—your direct-fit solution for Passion and Garden Leisure spa systems. Built to the exact dimensions of common replacements, this cartridge measures 4-15/16" in diameter and 13-1/2" in length, designed to slide into standard Passion/Garden Leisure filter housings and keep water clean between maintenance cycles.
- Diameter: 4-15/16" (approximately 4.9375")
- Length: 13-1/2"
- Top feature: V Groove semi-circle handle for easy grip and removal
- Bottom connection: SAE female threads for secure screw-in into compatible filter heads
- Direct replacements: Replaces 817-4050, PWW50L, FC-0172 & AK-90091
- Compatibility: Passion and Garden Leisure spa filtration systems
Compatibility & Fit
This cartridge is engineered to be a precise replacement for the original Passion/Garden Leisure filters. Its dimensions and thread configuration align with the common housings used in these spa systems, ensuring a snug seal and dependable filtration performance without the guesswork of aftermarket parts.
Why this cartridge stands out
Designed to mirror the geometry and connection points of the models it replaces, the 40508U helps maintain consistent flow and filtration efficiency. By sticking to the exact size and bottom SAE threading, you minimize the risk of leaks or compatibility issues, so you can enjoy smoother spa operation and clearer water between cleanings.
Installation & maintenance tips
- Power down the spa and relieve system pressure before handling the filter cartridge.
- Remove the old cartridge and rinse the housing to remove loose debris.
- Insert the new 40508U cartridge, ensuring the bottom SAE threads engage properly with the filter head.
- Hand-tighten only to avoid cross-threading or damage to the housing.
- Re-activate the system and monitor for any leaks or unusual flow; replace the cartridge when you notice a drop in flow or require more frequent cleaning cycles.
Ideal for
Perfect for homeowners and service professionals maintaining Passion or Garden Leisure spa setups, as well as anyone replacing aging or worn cartridges in 4-15/16" diameter, 13-1/2" long filter assemblies. If you’re familiar with models 817-4050, PWW50L, FC-0172, or AK-90091, this cartridge offers a seamless transition to renewed filtration performance.
Practical care & long-term value
Rinse the cartridge with clean water to remove trapped debris after service. When you notice reduced water clarity or slower flow, it’s time for a replacement. Keeping a correctly sized cartridge on hand helps avoid downtime and keeps your spa water inviting and comfortable.
With the Darlly 40508U, you get a reliable, dimensionally precise replacement that respects the way Passion/Garden Leisure filters were designed to work, helping you maintain clean, inviting spa water with less hassle.