AquaForte UltraSieve III Extra Wide – 3 × Inlets
High-Capacity Stainless Steel Sieve Pre-Filter for Large & Swimming Ponds
 
The UltraSieve III Extra Wide is the highest-capacity version in the AquaForte UltraSieve range, engineered for large koi ponds, swimming ponds, and high-flow gravity-fed systems.
It retains the same proven sieve technology and reliability that has made the UltraSieve range a market leader for over 15 years, while allowing higher flow rates and wider inlet configurations.
This model is designed for installations where standard sieves become a bottleneck.
 
How the UltraSieve Extra Wide Works
Pond water flows into the unit and over an auto-adjustable dam (weir):
The dam is connected to a float, automatically adjusting its height
This ensures exact flow balance between incoming pond water and pumped-out water
As pump speed changes, the weir self-adjusts to maintain stability
This intelligent level-control system is the key reason UltraSieves outperform many other sieve filters.
 
Key Advantages of the Floating Weir System
Exact water balance at all times
No air draw to the pump
Silent operation
No water loss
Very low installation height – the top edge of the UltraSieve only needs to sit 1 cm above pond water level
Compared to fixed weir systems, this provides far greater flexibility and stability.
 
High-Performance Sieve Filtration
Curved stainless steel sieve element
Hundreds of triangular stainless steel rods
Rods set at a precise angle to allow water to fall through while waste remains on top
Waste is removed before it can be broken down by the pump
This results in cleaner water, reduced ammonia load, and improved biological filtration efficiency.
 
Built for Higher Flow & Larger Inlets
Multiple or larger inlets possible
Standard configuration: 3 × 110 mm gravity inlets
Maximum pump speed: up to 20 m³/hour
Ideal for wide gravity lines and high-volume systems
The Extra Wide design reduces flow restriction and improves system efficiency.
 
Why Choose the UltraSieve III Extra Wide
Designed for large and swimming ponds
Extremely reliable – minimal moving parts
Stainless steel sieve element never needs replacing
Waste is fully separated from water circulation
Very easy to clean using the debris outlet
Competitive pricing due to simple, proven float system
This is professional-grade mechanical filtration at scale.
 
Ideal Applications
Large koi ponds
Swimming ponds
High-stock systems
Multi-bottom-drain installations
Commercial and high-end residential builds
 
Bottom Line
The AquaForte UltraSieve III Extra Wide is the correct choice when standard sieves are no longer sufficient. With higher flow capacity, wider inlet options, and the same proven floating weir technology, it delivers reliable, silent, and efficient mechanical filtration for serious pond systems.