HW‑604 – 16/22 bucket pre-filter

This SunSun HW-604 pre-filter is intended for aquarists running an external canister filter in the 250–2500 l range who want less frequent cleaning of the main unit. It is installed on the intake side and captures solid particles before they reach the main filter.

Why it matters

• All mechanical contaminants are retained in the pre-filter, which is easier to service than an external filter.
• Because debris is caught upstream, the time between opening the main filter is extended.
• The standard sponge set has three grades: one for capturing solid particles and others for developing the bacterial colony that breaks down harmful compounds in the water.
• Large hose connections fitted with valves allow the pre-filter to be isolated, and the valves can be detached together with the filled hoses for maintenance.

Specifications

• Dimensions: 215 × 195 × 365 mm
• Weight: 1.31 kg
• Designed for filters with a flow range of 250 to 2500 l
• Hose connection diameter: 16/22 mm
• Body, cover and other plastic parts: ABS
• Seals: rubber
• Sponge media: three grades

What it works with

The pre-filter is matched to SunSun HW canister filters and to the 250–2500 l flow range listed for this model, so it suits aquarium setups that use this class of external filtration. Its four-clamp lid closure and sealed rubber gaskets keep the pre-filter body closed under operating pressure.