tall cylindrical replacement filter cartridge with white pleated fabric and blue edges standing upright on white surface
Tall cylindrical replacement filter cartridge with white pleated material and blue plastic end caps, designed for water filtration systems
cylindrical replacement filter cartridge with blue circular end and perforated interior wall for water filtration
cylindrical pool filter cartridge with bright blue end caps and concentric circular patterns visible inside the hollow core

Unicel 7000 Series 100 sq. ft. Replacement Filter Cartridge | Pentair Mitra & Mytilus 100 GPM | C-7699

4.6 ★★★★ (124) ▾
Regular price$84.99
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$9.99 flat shipping on orders under $100.
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SKU:
C-7699
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About This Item

The Unicel C-7699 is a 7000 Series 100 sq. ft. replacement filter cartridge engineered for Pentair (Pac Fab) Mitra and Mytilus 100 GPM commercial and residential pool filters. With 142 precision pleats of 4 oz. Reemay 2040 media, it delivers extended service life, high flow efficiency, and the reliable filtration performance that pool professionals expect from Unicel.

⚠️ IMPORTANT: Wet Institute Modufilter M-330 Requires 3 Cartridges
If you are servicing a Wet Institute Modufilter M-330, this system requires 3 cartridges for a complete filter service. Replacing all cartridges at the same time ensures consistent flow, balanced filtration, and full filter efficiency. Add 3 units to your cart to complete your filter service.

Specifications

Filter Area 100 sq. ft.
Length 22 1/8"
Outer Diameter 7 7/8"
Top Inner Diameter 3 1/16"
Bottom Inner Diameter 3 1/16"
Material 4 oz. Reemay 2040
Pleat Count 142
Top Cap: open
Top Cap
Bottom Cap: open
Bottom Cap

Fits into:

OEM Brand Product Name Part Number Notes
Pentair Mitra 100 GPM (MA-100/160) R173300
Pentair Mytilus 100 GPM (MY 100) R173300
Pentair Mytilus-B 100 GPM R173300
Pentair Mytilus FMY 100 R173300
Pentair – Pac Fab Mitra 100 GPM (MA-100/160) 17-4985 Legacy Pac Fab P/N; superseded by R173300
Pentair – Pac Fab Mytilus 100 GPM (MY 100) 17-4985 Legacy Pac Fab P/N; superseded by R173300
Pentair – Pac Fab Mytilus-B 100 GPM 17-4985 Legacy Pac Fab P/N; superseded by R173300
Pentair – Pac Fab Mytilus FMY 100 17-4985 Legacy Pac Fab P/N; superseded by R173300
Wet Institute Modufilter M-330 32050204 3 cartridges required per service

(This is not an exhaustive list.)

Also known as: C7699

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Unicel Filter Cartridges and DE Grids

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.

More about Pool and Spa Filter Cartridges

Complete Your Pool Care Routine

Essential Pairing
Filter Cleaning Chemicals for All Types of Pool & Spa Filters

Using a specialized cleaner like FilterWash helps release deeply embedded oils and minerals that standard rinsing leaves behind.

Shop Filter Cleaning Chemicals for All Types of Pool & Spa Filters
Highly Recommended
Pool and Spa Plumbing Lubricants

Every time you open your filter tank, you must lubricate the O-ring to prevent dangerous leaks and ensure a watertight seal.

Shop Pool and Spa Plumbing Lubricants
Pro Tip: Don't Forget
Pool Test Kits and Water Analysis Tools

Balanced water pH prevents calcium scale from hardening your filter fabric and ruining your new cartridges.

Shop Pool Test Kits and Water Analysis Tools

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