Name: Unicel UHD-SR137 Replacement Filter Cartridge 137 sq. ft. | Sta-Rite Posi-Flo 135
Brand: Unicel
SKU: UHD-SR137
Price: 123.99 USD
Availability: InStock
Rating: 4.6 (58 reviews)

Unicel Replacement Filter Cartridge 137 sf Sta-Rite PMT135 | UHD-SR137

$123.99

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SKU:: UHD-SR137

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About This Item

The Unicel UHD Series UHD-SR137 is a 137 sq. ft. replacement filter cartridge precision-engineered for Sta-Rite Posi-Flo 135 series pool filters. Built with heavy-duty 4 oz. Reemay 2040 filtration media — a full ounce heavier than standard 3 oz. cartridges — and 216 precision-formed pleats, the UHD-SR137 delivers deeper dirt-holding capacity and extended service intervals, keeping your water clearer between cleanings.

Specifications

Filter Area	137 sq. ft.
Length	31 1/4"
Outer Diameter	8 11/16"
Top Inner Diameter	4 3/16"
Bottom Inner Diameter	4 3/16"
Material	4 oz. Reemay 2040
Pleat Count	216
Top Cap: open	Bottom Cap: open w/ 12 concentric slots

Note from Unicel: This cartridge typically features a blue top end cap and orange bottom end cap. End cap colors are cosmetic and do not affect fit or performance.

Fits into:

OEM Brand	Product Name	Part Number	Notes
Sta-Rite	Posi-Flo 135GPM-TX	177010 / WC108-70S2X	177010 = current Pentair part number; WC108-70S2X = legacy Sta-Rite part number
Sta-Rite	Posi-Flo 135TX	177010 / WC108-70S2X	177010 = current Pentair part number; WC108-70S2X = legacy Sta-Rite part number
Sta-Rite	Posi-Flo 135TXR	177010 / WC108-70S2X	177010 = current Pentair part number; WC108-70S2X = legacy Sta-Rite part number
Sta-Rite	Posi-Flo II PTM135	177010 / WC108-70S2X	177010 = current Pentair part number; WC108-70S2X = legacy Sta-Rite part number

(This is not an exhaustive list.)

Also known as: UHDSR137

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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