Cryspool Spa Filter 75 sq ft Replacement Cartridge 20-1/8" x 4-15/16" – Fits C-4975/PRB75, Washable Trilobal Media

Cryspool 04086 is a 75 sq. ft. replacement spa filter built to match C-4975 and PRB75 specifications for reliable debris capture and easy cleaning.

This cartridge is engineered to fit a wide range of hot tubs and spas that require a 20-1/8" length and a 4-15/16" outer diameter, providing a cost-effective alternative to several OEM part numbers. Constructed from a multilayer trilobal fiber fabric, the 04086 focuses on increased dirt-holding capacity and repeated washability so the filter maintains flow and extends service life when cared for regularly.

What are the exact dimensions and fit details?

The Cryspool 04086 measures 20-1/8" long with a 4-15/16" outer diameter and 2-1/8" openings on both ends, offering 75 square feet of filtration surface. These dimensions make it compatible with many top-load pressure and twist-top mount applications.

• Length: 20-1/8" (overall)
• Outer diameter: 4-15/16"
• Top/Bottom openings: 2-1/8"
• Filtration area: 75 sq. ft.

Which spa and filter models does it replace?

The 04086 is made to be a drop-in replacement for several part numbers used across spa brands. It matches the sizing and sealing geometry of common OEM cartridges so you can swap it into systems that list C-4975, PRB75 and similar numbers.

• Compatible references: C-4975, PRB75, FC-2395, R173435, 17-2632
• Works with Rainbow RTL-75 and Rainbow Dynamic 75 systems
• Fits various models from Nahani/MAAX, Hydro Pool, Emerald, Dakota and other spas

How does the material and construction affect performance?

Cryspool uses a trilobal fiber fabric that creates more surface area and deeper pleat capacity than standard point-bond media. This structure captures finer particles and resists compaction, allowing water to pass freely while trapping debris for longer between cleanings.

• Trilobal fibers increase dirt-holding ability
• Pleated construction expands filtration area to 75 sq. ft.
• Durable end caps and pleat support reduce deformation under pressure

What maintenance steps keep the filter working longer?

The filter is designed for repeated rinsing and can be restored close to new performance when cleaned properly. Rinse with a high-pressure hose and use a cleaning soak when needed; replace only when physical damage or irreversible clogging appears.

• Rinse pleats with a strong spray; clean when gauge indicates higher pressure
• Soak periodically with a cartridge cleaner for oils and mineral buildup
• Inspect end caps and pleat integrity during each cleaning

Who is this for: The Cryspool 04086 is aimed at spa owners and maintenance technicians who need a durable, washable 75 sq. ft. cartridge compatible with many C-4975/PRB75 applications. It suits anyone looking to maintain optimal flow and filtration without relying on OEM-only parts, provided they follow routine cleaning and inspection to maximize service life.