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
