Name: Unicel 4000 Series 20 sq. ft. Replacement Filter Cartridge | 4CH-925
Brand: Unicel
SKU: 4CH-925
Price: 38.99 USD
Availability: InStock

cylindrical white and blue replacement filter cartridge with pleated sides and product label on front

cylindrical white pool filter cartridge with blue plastic top and bottom on white background

White pleated cylindrical filter cartridge with a blue plastic end cap featuring a handle and central hole

cylindrical white and blue replacement filter cartridge with a threaded blue end against a white background

$38.99

$9.99 flat shipping on orders under $100.

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SKU:: 4CH-925

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About This Item

The Unicel 4000 Series 4CH-925 is a 20 sq. ft. replacement filter cartridge engineered for top-load filter systems built by Strong Industries. With 190 precision-pleated folds of 3 oz. Reemay 2033 spunbond polyester media, this cartridge delivers consistent water clarity and long-lasting filtration performance in a compact 7 1/4" profile.

Specifications

Filter Area	20 sq. ft.
Length	7 1/4"
Outer Diameter	4 5/8"
Top Inner Diameter	N/A
Bottom Inner Diameter	N/A
Material	3 oz. Reemay 2033
Pleat Count	190
Top Cap: semi-circular handle	Bottom Cap: injection molded 1-1/2" SAE thread

Fits into:

OEM Brand	Product Name	Part Number	Notes
Strong Industries	20 sq. ft. Top Load Filter	—	Unicel designated replacement for Strong Industries top-load filter systems.

(This is not an exhaustive list.)

About Unicel Filter Cartridges and DE Grids

The "Gold Standard" of Replacement Cartridges
For over 50 years, Unicel (Meissner Mfg.) has been the professional's choice for restoring pool water clarity. While generic "knock-off" filters often use cheap, fuzzy fabric that clogs quickly, Unicel uses genuine Reemay® Filtration Media. This patented synthetic fiber features a unique trilobal shape that traps significantly more dirt and oils without choking your pump's water flow. Based in California, Unicel doesn't just copy filter dimensions; they engineer them to strict Original Equipment Manufacturer (OEM) specifications. This ensures a "lock-tight" fit in your filter tank, preventing debris from bypassing the system and returning to your pool.

Why We Trust Unicel Filter Cartridges and DE Grids: Genuine Reemay® Media: Uses continuous trilobal fibers to capture microscopic debris without restricting water flow.

Precision "Exact Fit": Engineered to match your tank's original specifications for a 100% leak-free seal.

Made in the USA: Manufactured in California with heavy-duty urethane end caps that resist cracking under pressure.

Longer Lifespan: Sharp, rigid pleats resist collapsing during cleaning, meaning you buy fewer replacements over time.

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