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Product guide

Fluval A20216 FX5 Aquastop Valve and O-Ring, 2-Piece

Piece: Fluval A20216 is an Aquastop valve and O-ring set listed for FX5 and FX6 filters. The listing says the valve helps regulate water flow and gives silicone as the material, making this a replacement part to consider when the model and part match your filter.

At a glance

  • The listing identifies the part as an Aquastop valve for FX5 and FX6 filters.
  • The valve is described as helping regulate water flow.
  • Silicone is the listed material.
Price
$27.93Save 34%

Reference price: $42.46

Price checked: 13 Nov 2026

View offer

Often bought together

Pros and cons

Pros

  • The stated FX5 and FX6 compatibility helps buyers identify the intended filter models.
  • A water-flow regulation function is specified for this replacement part.

Technical specifications

8 specifications
Identity
BrandFluval
ModelA20216
Listed filter fitAquastop valve for FX5 and FX6 filters
Set name2-Piece
Dimensions and installation
Weight listed0.05 Kilograms
Materials and protection
Material listedSilicone
ColourBlack/ Red
Spare-part information
EU spare part availability duration5 Years

What to know before buying

Listing details to confirm

The title calls this a valve and O-ring, 2-piece set, while product details also list one item and one piece. Confirm the selected listing's supplied components and fit before ordering. The five-year spare-part availability claim is specifically for the EU.

Who is it for?

A good fit for

  • Owners of Fluval FX5 or FX6 filters looking for the listed Aquastop valve and O-ring replacement.

Less suited to

  • Buyers who need a complete filter or a part for a different filter model.
Fluval A20216 FX5 Aquastop Valve and O-Ring, 2-Piece · photo 2
Additional product photo 2

Customer reviews on Amazon

4.6 / 5 · 1,157 ratings
  • 5 stars82%82%
  • 4 stars9%9%
  • 3 stars4%4%
  • 2 stars3%3%
  • 1 star2%2%

Aggregate customer ratings lean strongly towards the five-star category, but a smaller share falls into lower star categories. Without comment-level feedback, those ratings do not establish particular strengths or explain concerns. For a replacement valve, confirm compatibility and the contents discrepancy against your filter and the selected listing.

Frequently asked questions

Which filters does the listing name?

It describes the Aquastop valve as for Fluval FX5 and FX6 filters.

What does the valve do?

The listing says Aqua Stop Valves help regulate water flow.

Does the listing clearly confirm the set contents?

Not consistently. The title says valve and O-ring, 2-piece, while details state one item and one piece. Check the selected listing's contents before buying.

Fluval A20216 FX5 Aquastop Valve and O-Ring, 2-Piece · photo 3
Additional product photo 3

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