Name: Unicel UHD-SR70 Replacement Filter Cartridge 72 sq. ft. | Sta-Rite Posi-Flo 70
Brand: Unicel
SKU: UHD-SR70
Price: 76.99 USD
Availability: InStock
Rating: 4.8 (258 reviews)

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

Tall cylindrical pool filter cartridge with white pleated material suspended between a blue top rim and an orange bottom rim

cylindrical pool filter cartridge with pleated white material and blue top plastic end cap marked Unicel

cylindrical pool filter cartridge with bright orange end cap and pleated white filtering material inside

$76.99

$9.99 flat shipping on orders under $100.

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SKU:: UHD-SR70

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About This Item

The Unicel UHD-SR70 is a 72 sq. ft. UHD Series replacement filter cartridge engineered for Sta-Rite Posi-Flo 70 single-cartridge pool filters. Built with heavy-duty 4 oz. Reemay 2040 filtration fabric — 33% denser than standard 3 oz. media — this cartridge traps finer debris, delivers superior water clarity, and holds up to repeated cleaning cycles longer than entry-level replacements.

Specifications

Filter Area	72 sq. ft.
Length	18 3/16"
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 typically features a blue top end cap and an orange bottom end cap. These colors are cosmetic and do not affect fit or performance.

Fits into:

OEM Brand	Product Name	Part Number	Notes
Sta-Rite	Posi-Flo 70GPM-TX	WC108-57S2X / 177008	WC108-57S2X = legacy Sta-Rite part; 177008 = current Pentair part
Sta-Rite	Posi-Flo 70TX	WC108-57S2X / 177008	WC108-57S2X = legacy Sta-Rite part; 177008 = current Pentair part
Sta-Rite	Posi-Flo 70TXR	WC108-57S2X / 177008	WC108-57S2X = legacy Sta-Rite part; 177008 = current Pentair part
Sta-Rite	Posi-Flo II PTM70	WC108-57S2X / 177008	WC108-57S2X = legacy Sta-Rite part; 177008 = current Pentair part
Sta-Rite	Posi-Flo T-70TX	WC108-57S2X / 177008	WC108-57S2X = legacy Sta-Rite part; 177008 = current Pentair part
Sta-Rite	Posi-Flo T-70TXR	WC108-57S2X / 177008	WC108-57S2X = legacy Sta-Rite part; 177008 = current Pentair part

(This is not an exhaustive list.)

Also known as: UHDSR70

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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