AquaClear 425 SQ. FT. Replacement Cartridge
Replacement cartridge element designed for the Illuminex AquaClear 425 SQ. FT. Cartridge Filter.
Designed for LU-CF425
Replacement Cartridge Only
This product is the internal replacement cartridge element for AquaClearLU-CF425. The complete filter housing and other filter components are not included. Confirm model LU-CF425 before ordering.
For AquaClear LU-CF425
Replacement cartridge element for the AquaClear 425 SQ. FT. Cartridge Filter, model LU-CF425.
LU-CF425 Compatible
Dedicated replacement cartridge for the AquaClear 425 SQ. FT. filter.
Cartridge Filtration
Replacement filtration element installed inside the compatible AquaClear filter housing.
Service Replacement
Designed for routine cartridge-filter service and replacement.
The Replaceable Element Inside AquaClear 425
The cartridge installs inside the AquaClear LU-CF425 filter housing and provides the replaceable filtration surface used by the cartridge-filter system.
It can be removed for approved cleaning, inspection and replacement without replacing the complete filter assembly.
This Is a Replacement Cartridge — Not the Complete Filter
The parent LU-CF425 complete filter is documented with 425 SQ. FT. filtration area, 150 GPM max flow rate, 2-inch inlet/outlet, and up to 50,000-gallon pool capacity. These are complete-filter specifications and are not presented as specifications of the replacement cartridge unless separately verified.
Designed for AquaClear 425
This cartridge is model-specific to LU-CF425. It does not fit AquaClear LU-CF200 or LU-CF525 — those filters use dedicated replacement cartridges LU-CFE200 and LU-CFE525 respectively.
Where It Fits
Conceptual location of the replacement cartridge inside the AquaClear LU-CF425 filter housing.
Conceptual product-location visual — refer to the current AquaClear LU-CF425 manual and parts diagram for exact installation details.
Choose the Cartridge for Your AquaClear Model
Replacement cartridges are model-specific. Always confirm the AquaClear model number before ordering.
AquaClear 425
Product & Package Details
Package dimensions are the shipping/listed dimensions — not physical cartridge dimensions. UPC is from the Illuminex price list.
Micron rating, pleat count, media material, core material, end-cap material, cartridge diameter, and cartridge height are not published unless approved data exists. Material is not inferred from the pleated appearance of the cartridge.
Cleaning & Cartridge Care
Shut Down the System
Turn off the circulation pump before opening the filter.
Relieve Filter Pressure
Fully relieve pressure from the filtration system according to the current AquaClear instructions.
Access the Cartridge
Open the filter housing using the approved LU-CF425 service procedure.
Inspect & Clean
Inspect and clean the cartridge according to the current AquaClear maintenance instructions.
Replace When Required
Install LU-CFE425 when the approved AquaClear 425 replacement cartridge is required.
Cleaning and replacement frequency depends on pool use, debris load, system operation, and cartridge condition. No fixed interval is published unless approved AquaClear documentation provides one. Do not invent chemical soaking ratios, pressure-washer instructions, acid cleaning, or a pressure-rise threshold (e.g. "clean at 8 PSI above starting pressure") unless the current AquaClear manual explicitly gives that value.
When Should the Cartridge Be Replaced?
Visible Damage
Inspect the cartridge for torn media, damaged pleats or other visible physical deterioration.
Reduced Serviceability
If the element can no longer be properly cleaned or maintained according to the AquaClear instructions, replacement may be required.
Correct Replacement
Use LU-CFE425 when replacing the cartridge element in AquaClear LU-CF425.
Depressurize Before Opening the Filter
Turn off the circulation pump and fully relieve pressure from the filtration system before opening the AquaClear filter housing or removing the cartridge.
Follow the current AquaClear LU-CF425 service instructions.
Never loosen the clamp while the system is pressurized.
Never open the filter housing while the pump is running.
What's Included
Package contents come from the actual product record. No filter housing, clamp ring, pressure gauge, air-relief assembly, O-ring, drain plug, filter unions, or cleaning equipment is shown unless explicitly included.
Confirm the Correct Replacement
Find Your Filter Model
Locate the AquaClear model number on the filter label (LU-CF200, LU-CF425, or LU-CF525).
Match the Cartridge
Confirm the correct replacement SKU for your filter — LU-CFE425 for LU-CF425.
Confirm Availability
Contact our team to confirm current availability before ordering.
Request This Cartridge
Tell us about your AquaClear filter and we'll confirm the correct replacement cartridge and availability. Your request automatically references this product.
Related AquaClear 425 Replacement Parts
Other AquaClear Replacement Cartridges
These cartridges are for different parent filters — they are not compatible with LU-CF425.
Resources
Only approved resources are listed. For the LU-CF425 parts diagram and cartridge cleaning instructions, contact our team.