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Empty Refillable Cartridge 10" x 2.5" White/White (FI-EC10W)

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Empty Refillable Cartridge 10" x 2.5" White/White (FI-EC10W)

The Watts FI-EC10W empty refillable cartridge gives you complete control over your filtration media, letting you custom-blend sediment, carbon, KDF, or specialty resins to match your exact water quality needs. This 10" x 2.5" white housing fits all standard filter housings and can be opened, refilled, and reused indefinitely.
SPECIFICATIONS

Watts FI-EC10W Technical Details

Model Number FI-EC10W (RC-W-975-50)
Dimensions 10 inches x 2.5 inches
Cap Color White/White
Housing Compatibility Standard 10" filter housings
Material Food-grade polypropylene
Refillable Yes, unlimited cycles
Media Capacity Approximately 1 lb (varies by media)
Manufacturer Watts Water Technologies
INSTALLATION & USE

How to Fill and Install

  1. Unscrew the cartridge cap and fill the housing with your chosen media (granular carbon, KDF-55, calcite, bone char, or custom blends). Leave 1/2 inch of headspace at the top.
  2. Thread the cap back on hand-tight, ensuring the internal screen is seated properly to prevent media migration.
  3. Install the filled cartridge into your standard 10" filter housing, turning off water supply first and depressurizing the system.
  4. Flush the cartridge for 3-5 minutes after installation to remove fines and settle the media bed.
  5. Replace or refill media every 6-12 months depending on water quality and media type used.
COMPATIBILITY

System Fit

The Watts FI-EC10W fits any standard 10-inch filter housing with 2.5-inch inner diameter, including housings from Pentek, Culligan, Omnifilter, GE, iSpring, and most whole-house or point-of-use filter systems. The universal design works with both vertical and horizontal mounting orientations. This cartridge is ideal for well water treatment, aquarium applications, hydroponics, brewing, or any situation where off-the-shelf filter formulations don't match your specific water chemistry.

🔧 Pro tip: Wet your filter media before filling the cartridge to reduce air pockets and prevent channeling. For mixed-media beds, layer denser materials like KDF on the bottom and lighter carbon on top to prevent stratification during backwash cycles.
The Watts FI-EC10W empty refillable cartridge gives you complete control over your filtration media, letting you custom-blend sediment, carbon, KDF, or specialty resins to match your exact water quality needs. This 10" x 2.5" white housing fits all standard filter housings and can be opened, refilled, and reused indefinitely.
SPECIFICATIONS

Watts FI-EC10W Technical Details

Model Number FI-EC10W (RC-W-975-50)
Dimensions 10 inches x 2.5 inches
Cap Color White/White
Housing Compatibility Standard 10" filter housings
Material Food-grade polypropylene
Refillable Yes, unlimited cycles
Media Capacity Approximately 1 lb (varies by media)
Manufacturer Watts Water Technologies
INSTALLATION & USE

How to Fill and Install

  1. Unscrew the cartridge cap and fill the housing with your chosen media (granular carbon, KDF-55, calcite, bone char, or custom blends). Leave 1/2 inch of headspace at the top.
  2. Thread the cap back on hand-tight, ensuring the internal screen is seated properly to prevent media migration.
  3. Install the filled cartridge into your standard 10" filter housing, turning off water supply first and depressurizing the system.
  4. Flush the cartridge for 3-5 minutes after installation to remove fines and settle the media bed.
  5. Replace or refill media every 6-12 months depending on water quality and media type used.
COMPATIBILITY

System Fit

The Watts FI-EC10W fits any standard 10-inch filter housing with 2.5-inch inner diameter, including housings from Pentek, Culligan, Omnifilter, GE, iSpring, and most whole-house or point-of-use filter systems. The universal design works with both vertical and horizontal mounting orientations. This cartridge is ideal for well water treatment, aquarium applications, hydroponics, brewing, or any situation where off-the-shelf filter formulations don't match your specific water chemistry.

🔧 Pro tip: Wet your filter media before filling the cartridge to reduce air pockets and prevent channeling. For mixed-media beds, layer denser materials like KDF on the bottom and lighter carbon on top to prevent stratification during backwash cycles.
$10.50
Empty Refillable Cartridge 10" x 2.5" White/White (FI-EC10W)—
$10.50

Description

The Watts FI-EC10W empty refillable cartridge gives you complete control over your filtration media, letting you custom-blend sediment, carbon, KDF, or specialty resins to match your exact water quality needs. This 10" x 2.5" white housing fits all standard filter housings and can be opened, refilled, and reused indefinitely.
SPECIFICATIONS

Watts FI-EC10W Technical Details

Model Number FI-EC10W (RC-W-975-50)
Dimensions 10 inches x 2.5 inches
Cap Color White/White
Housing Compatibility Standard 10" filter housings
Material Food-grade polypropylene
Refillable Yes, unlimited cycles
Media Capacity Approximately 1 lb (varies by media)
Manufacturer Watts Water Technologies
INSTALLATION & USE

How to Fill and Install

  1. Unscrew the cartridge cap and fill the housing with your chosen media (granular carbon, KDF-55, calcite, bone char, or custom blends). Leave 1/2 inch of headspace at the top.
  2. Thread the cap back on hand-tight, ensuring the internal screen is seated properly to prevent media migration.
  3. Install the filled cartridge into your standard 10" filter housing, turning off water supply first and depressurizing the system.
  4. Flush the cartridge for 3-5 minutes after installation to remove fines and settle the media bed.
  5. Replace or refill media every 6-12 months depending on water quality and media type used.
COMPATIBILITY

System Fit

The Watts FI-EC10W fits any standard 10-inch filter housing with 2.5-inch inner diameter, including housings from Pentek, Culligan, Omnifilter, GE, iSpring, and most whole-house or point-of-use filter systems. The universal design works with both vertical and horizontal mounting orientations. This cartridge is ideal for well water treatment, aquarium applications, hydroponics, brewing, or any situation where off-the-shelf filter formulations don't match your specific water chemistry.

🔧 Pro tip: Wet your filter media before filling the cartridge to reduce air pockets and prevent channeling. For mixed-media beds, layer denser materials like KDF on the bottom and lighter carbon on top to prevent stratification during backwash cycles.
Empty Refillable Cartridge 10" x 2.5" White/White (FI-EC10W) | Isopure Water