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Fluval FX4 and FX6 replacement parts guide

If you need to replace a part of your Fluval FX4 or FX6 canister filter, then you can take a look at this guide from Aquarium Blueprints to help you identify which specific part or parts you need to order.

What FX4 and FX6 parts can be replaced?

The following parts of the FX4 and FX6 can be replaced:

  • AquaStop Valves
  • Bio Foam
  • BioMax Ceramic Rings
  • Carbon Pad
  • Drain Cap
  • Filter Canister
  • Filter Lid
  • Filter Lid O-ring
  • Foam
  • Half Media Baskets
  • Hosing Metal Clamp
  • Intake Stem
  • Lid Fasteners
  • Magnetic Impeller Assembly
  • Motor Seal Ring
  • Output Nozzle Assembly
  • Pump Unit Motor with Power Cord
  • Media Bags
  • Media Baskets
  • Ribbed Hosing
  • Rim Connector Suction Cups
  • Rim Connector with Clips
  • Rubber Connector
  • Rubber Feet
  • Strainer
  • Strainer Suction Cup
  • Top Cover Click-Fit O-ring
  • T-Bar Handles
  • Utility Valve
  • Utility Valve Hosing

We suggest checking out the third, fourth and fifth pages of the user manual if you need a visual guide to identify the part or parts that you want to replace on your FX4 or FX6 canister filter.

What parts can be shared between the FX4 and FX6?

The FX4 and FX6 share a lot of common parts. The following replacements can be used for both of these Fluval canister filters:

  • AquaStop Valves
  • Bio Foam
  • BioMax Ceramic Rings
  • Carbon Pad
  • Filter Lid O-Ring
  • Foam
  • Half Media Baskets
  • Hosing Metal Clamp
  • Intake Stem
  • Lid Fasteners
  • Media Bags
  • Ribbed Hosing
  • Rim Connector Suction Cups
  • Rim Connector with Clips
  • Rubber Connector
  • Rubber Feet
  • Strainer
  • Strainer Suction Cup
  • Top Cover Click-Fit O-ring
  • Utility Valve
  • Utility Valve Hosing

What parts are different for the FX4 and FX6?

The FX4 and FX6 do have parts that can’t be used with the other canister filter. Therefore, you need to be careful that you are ordering the following for your Fluval canister filter:

  • Drain Cap
  • Filter Canister
  • Filter Lid
  • Output Nozzle Assembly
  • Magnetic Impeller Assembly
  • Media Baskets
  • Motor Seal Ring
  • Pump Unit Motor with Power Cord
  • T-Bar Handles

FX4 replacement part item numbers

You can find the item number for each of the Fluval FX4 replacement parts, if applicable, below:

  • AquaStop Valves (A20216)
  • Bio Foam (A239)
  • BioMax Ceramic Rings (A1456)
  • Carbon Pad (A249)
  • FX4 Drain Cap (No Part Number)
  • FX4 Filter Canister (No Part Number)
  • FX4 Filter Lid (No Part Number)
  • Filter Lid O-Ring (A20210)
  • Foam (A228)
  • FX4 Media Baskets (A20239)
  • Half Media Baskets (A20243)
  • Hosing Metal Clamp (A20234)
  • Intake Stem (A20225)
  • Lid Fasteners (A20215)
  • Magnetic Impeller Assembly (A20208)
  • Motor Seal Ring (A20211)
  • Output Nozzle Assembly (A20227)
  • Pump Unit Motor with Power Cord (A20202)
  • Media Bags (A1428)
  • Ribbed Hosing (A20236)
  • Rim Connector Suction Cups (A20232)
  • Rim Connector with Clips (A20230)
  • Rubber Connector (A20228)
  • Rubber Feet (A20121)
  • Strainer (A20221)
  • Strainer Suction Cup (A15041)
  • Top Cover Click-Fit O-Ring (A20212)
  • T-Bar Handles (A20242)
  • Utility Valve (A20219)
  • Utility Valve Hosing (A20237)

FX6 replacement part item numbers

You can check out the item number for each of the FX6 replacement parts, if applicable, below:

  • AquaStop Valves (A20216)
  • Bio Foam (A239)
  • BioMax Ceramic Rings (A1456)
  • Carbon Pad (A249)
  • FX6 Drain Cap (No Part Number)
  • FX6 Filter Canister (No Part Number)
  • FX6 Filter Lid (No Part Number)
  • Filter Lid O-Ring (A20210)
  • Foam (A228)
  • FX6 Media Bags (A1428)
  • Half Media Baskets (A20243)
  • Hosing Metal Clamp (A20234)
  • Intake Stem (A20225)
  • Lid Fasteners (A20215)
  • Magnetic Impeller Assembly (A20206)
  • Motor Seal Ring (A20207)
  • Output Nozzle Assembly (A20226)
  • Pump Unit Motor with Power Cord (A20201)
  • Media Baskets (A20239)
  • Ribbed Hosing (A20236)
  • Rim Connector Suction Cups (A20232)
  • Rim Connector with Clips (A20230)
  • Rubber Connector (A20228)
  • Rubber Feet (A20121)
  • Strainer (A20221)
  • Strainer Suction Cup (A15041)
  • Top Cover Click-Fit O-Ring (A20212)
  • T-Bar Handles (A20241)
  • Utility Valve (A20219)
  • Utility Valve Hosing (A20237)

If your Fluval FX4 or FX6 is making a lot of noise when turned on, then we recommend that you take a look at this troubleshooting guide to see how you can potentially make your canister filter quieter during operation.