BioPress 4000

Small pond, limited space, but you still want clear water? The OASE BioPress 4000 is a compact pressure filter with integrated UV-C, built for ponds up to 4,000 litres.

It’s ideal where you need to push water back up to a waterfall or stream – pressure filters sit neatly out of sight and can be partially buried.

 

Why it’s a solid choice

• Integrated UV-C clarifier for green water control
• Pressure filter design – return water uphill to a blade or cascade
•  Compact footprint – easy to hide beside the pond
•  Simple mechanical and biological filtration in one unit

This model is suited to ornamental ponds without heavy koi stocking. If you’re keeping koi, size up.

 

Typical installation layout

Pump → BioPress 4000 → Waterfall / return to pond

Because it’s a pressure filter, you can:

• Run flexible hose from the pump into the filter
• Push water uphill to a blade or raised return
• Hide the unit behind planting or sink it slightly into the ground

 

Fit & plumbing notes

For secure hose connections, pair with:

• 1.5″ stainless steel jubilee clips
• Compression fittings for flexible hose

(Confirm your hose diameter before ordering.)

 

Maintenance

• Rinse mechanical foams regularly to prevent flow restriction
• Replace the UV-C lamp annually to maintain performance
• Always unplug before opening the unit
• Protect eyes and skin from UV-C exposure

 

Is this the right size for you?

The 4000 model is best for:

• Small ornamental ponds
• Light fish loads
• Water features with modest flow

 

Technical data