Name: Unicel UHD-SR100 Replacement Filter Cartridge 102 sq. ft. | Sta-Rite Posi-Flo 100
Brand: Unicel
SKU: UHD-SR100
Price: 98.99 USD
Availability: InStock
Rating: 4.7 (202 reviews)

Tall cylindrical pool filter cartridge with pleated white material, blue top edge, and orange bottom edge with a label

Tall cylindrical pool filter cartridge with tightly pleated white filter material and blue top with orange bottom edges

Cylindrical pool filter cartridge with red and blue plastic end caps and pleated white filter material

cylindrical pool filter cartridge with a red center rim and white pleated filter material

$98.99

$9.99 flat shipping on orders under $100.

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SKU:: UHD-SR100

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About This Item

The Unicel UHD-SR100 is a heavy-duty replacement filter cartridge engineered for Sta-Rite's Posi-Flo 100 series filters. At 102 sq. ft. of filtration area and 195 precision pleats of 4 oz. Reemay 2040 media, this UHD Series cartridge delivers reliable performance for residential pool applications where the Posi-Flo 100 is the workhorse.

Specifications

Filter Area	102 sq. ft.
Length	25 11/16"
Outer Diameter	8 11/16"
Top Inner Diameter	4 3/16"
Bottom Inner Diameter	4 3/16"
Material	4 oz. Reemay 2040
Pleat Count	195
Top Cap: open	Bottom Cap: open w/ 12 concentric slots

Note from Unicel: This cartridge features a blue top end cap and an orange bottom end cap for quick orientation during installation.

Fits into:

OEM Brand	Product Name	Part Number	Notes
Sta-Rite	Posi-Flo 100GPM-TX	WC108-58S2X / 177009	Unicel replacement has blue top and orange bottom end caps
Sta-Rite	Posi-Flo 100TX	WC108-58S2X / 177009	Unicel replacement has blue top and orange bottom end caps
Sta-Rite	Posi-Flo 100TXR	WC108-58S2X / 177009	Unicel replacement has blue top and orange bottom end caps
Sta-Rite	Posi-Flo II PTM100	WC108-58S2X / 177009	Unicel replacement has blue top and orange bottom end caps
Sta-Rite	Posi-Flo T-100TX	WC108-58S2X / 177009	Unicel replacement has blue top and orange bottom end caps
Sta-Rite	Posi-Flo T-100TXR	WC108-58S2X / 177009	Unicel replacement has blue top and orange bottom end caps

(This is not an exhaustive list.)

Also known as: UHDSR100

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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