HW‑602 – external pre-filter

The SunSun HW-602 is a mechanical prefilter for hobbyists running an external aquarium filter who want to reduce how often the main filter needs cleaning. It fits in front of any external filter with a flow rate between 250 l/h and 1400 l/h and holds debris before it reaches the media inside the main unit.

Why it matters

• All mechanical contamination is retained in the prefilter's 1.5 l chamber, so the main filter receives less debris.
• Because the prefilter takes the first load of waste, the interval between opening the main filter for servicing is longer.
• The housing is made of ABS, which the manufacturer describes as resistant to cracking and mechanical damage. The seals are made of rubber for flexibility and durability.
• The lid is closed with four lever-and-latch clamps that press the cover down to keep the housing sealed.

Specifications

• Capacity: 1.5 l
• Dimensions: 140 x 140 x 255 mm
• Weight: 0.75 kg
• Hose connection: 16/22 mm or 16/20 mm
• Compatible flow rate: 250 l/h to 1400 l/h
• Material: ABS housing and lid

What it works with

The HW-602 is designed for freshwater aquariums that use an external canister filter in the 250–1400 l/h range. Its valves on the hose connections let you close the water circuit and detach the prefilter together with the hoses still full, so you can clean it without draining the system. Confirm that your external filter's flow rate falls within the stated range before purchase.