Name: Unicel C-8474 Replacement Filter Cartridge for Astral 2507 CE Terra & Speck Pumps AC2507 | 75 Sq. Ft. | 15"
Brand: Unicel
SKU: C-8474
Price: 77.99 USD
Availability: InStock

C-8474 Unicel spa filter cartridge with white pleated material and blue circular end caps shown upright

C-8474 Unicel spa filter cartridge with white pleated body and blue plastic top showing model number

close up top view of unicel c-8474 spa filter cartridge showing perforated white inner core surrounded by blue plastic top ring

cylindrical white pool filter cartridge with blue top and bottom edges and a label with product details and mascot

$77.99

$9.99 flat shipping on orders under $100.

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SKU:: C-8474

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About This Item

Specifications

Filter Area	75 sq. ft.
Length	15"
Outer Diameter	8 15/16"
Top Inner Diameter	3 3/4"
Bottom Inner Diameter	3 3/4"
Material	4 oz. Reemay 2040
Pleat Count	165
Top Cap: Open	Bottom Cap: Open

Fits into:

OEM Brand	Product Name	Part Number	Notes
Astral	2507 CE Terra	18219R0100	Also listed as 18219RO100 (letter O) in some older documentation — same part
Speck Pumps	AC2507	18219R0100

(This is not an exhaustive list.)

Pro Tip: Before ordering, measure your existing cartridge's outer diameter and inner diameter at both ends — the C-8474's 8 15/16" OD and 3 3/4" openings are specific to the Astral Terra 50 CE and Speck AC2507 canister housings. If your documentation shows part number 18219RO100 (with a letter O), that is a known typographical variant of 18219R0100 — both refer to this same cartridge.

Also known as: C8474

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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