Health Water 4 – bucket filter, 2000 l/h
SunSun Health Water 4 HW‑704A is a 45 W external canister filter rated at 2000 l/h, intended for aquariums…
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The Health Water 4 is a canister filter for keepers who run mid-sized aquariums and need a high flow rate from a single unit. It is the 704 model in SunSun's updated Health Water line, which replaces the earlier HW series. Its main changes are in the lid seal, the basket, the air handling, the motor and the inlet and outlet fittings.
Why it matters
- Leak-resistant lid: guide rails hold the lid in the correct position when closed, which addresses seal leaks caused by a lid placed at an angle.
- Reinforced double basket: the media basket has support columns that stiffen the body and dampen vibration, reducing the operating noise of the filter.
- Air-free flow path: the impeller position and internal flow channels move trapped air out through the outlet instead of holding it in the priming chamber, so the filter does not need repeated pumping to restart.
- Lower power draw: the new motor uses 22% less energy than the previous HW motor, according to the manufacturer.
Specifications
- Model: SunSun HW-704A (Health Water 4)
- EAN: 5903900047807
- Pump power: 45 W
- Flow rate: 2000 l/h
- Recommended aquarium size: 500 l
- Minimum aquarium size: 300 l
- Inlet tube extension: 15–60 cm
- Outlet spray bar extension: 20–40 cm, rotating
- Dimensions: 27 × 27 × 44 cm (including hose adapters)
- Weight: 8.2 kg
What it works with
The filter is designed for aquariums of 300 to 500 l, with the 500 l figure given as the recommended size. The inlet and outlet include suction cups, hose clamps and tube extensions that let the unit be positioned against the rim of the tank. Its flow rate and basket capacity suit a filter used with a full set of filter media in a single tank.
Technical specification
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Frequently asked questions
The minimum aquarium size for this filter is 300 litres, and the manufacturer dedicates it to a 500-litre aquarium. Its pump delivers 2000 l/h and draws 45 W.
The manufacturer redesigned the impeller position and the water flow channels so that air bubbles are not held inside the filter. Instead, they are pushed out through the outlet, which avoids the air lock that often requires pumping or shaking for days.
The lid has guide rails that keep it correctly aligned when closed, which removes the main sealing problem caused by a tilted cover. Closing the lid in the right position is therefore easier.
The inlet tube extends from 15 to 60 cm using modules, and the rotating spray-bar outlet extends from 20 to 40 cm. Both have clips for the aquarium rim, and suction cups and hose clamps are included.
The reinforced basket walls are designed to dampen vibration and reduce the sound of the filter operating.
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