Water pre-filter SteriPEN Steripen Pre-Filter 40 µm wide inlet

SteriPEN Steripen Pre-Filter 40 µm wide inlet is a compact water pre-filter designed to remove coarse sediment and particulate matter before water enters portable purification devices. With a 40 micron filtration rating and a wide inlet, this pre-filter helps reduce turbidity and prevents clogging of UV and chemical treatment units. It is intended for use with SteriPEN systems and other portable purifiers in outdoor, travel and emergency water treatment situations.

Advantages

The pre-filter offers mechanical protection to downstream purification devices by capturing sand, silt and larger organic particles while maintaining a flow rate suitable for portable UV pens and pump systems. Its wide inlet simplifies connection to varied water sources and reduces the need for repeated backflushing. The 40 µm rating balances effective sediment removal with minimal pressure drop, helping to prolong the life and maintain the performance of UV and chemical treatment units.

Suitable for

• Pre-treatment of lake, river and stream water with visible sediment
• Reducing turbidity before UV sterilizers such as SteriPEN devices
• Use with portable pumps and gravity filters to extend service intervals
• Emergency and survival water kits where rapid sediment removal is required

Key specifications

• Filtration rating: 40 micrometres (µm)
• Inlet type: wide inlet for easier connection to varied water sources
• Primary function: particulate and sediment removal prior to purification
• Compatibility: designed for use with SteriPEN systems and other portable purifiers
• Typical applications: outdoor, travel and emergency water treatment

How to use

Attach the SteriPEN Pre-Filter to the water source or to the inlet hose of your portable purifier according to the connector type. Position the wide inlet facing the water with the intake submerged if drawing from a natural source, or attach inline with a pump or gravity feed. Allow water to pass through the pre-filter before it reaches the UV or chemical treatment unit to reduce visible sediment and turbidity. Inspect the filter regularly and clear large debris by rinsing; replace the pre-filter when flow becomes significantly reduced or when physical wear is visible.

Usage recommendations

For best results, use the pre-filter whenever source water contains visible particles. Combine with a UV SteriPEN or chemical treatment for microbial disinfection after sediment removal. Avoid using the pre-filter with water containing oils, heavy chemical contamination or very fine colloidal material that may require finer filtration or coagulation prior to purification.