PALL 4221-N Filter Funnel Stainless Steel, 100 mL, 47 mm, 1/pkg

The Pall 4221-N filter funnel is a reusable laboratory funnel designed for vacuum filtration applications, allowing researchers to separate solids from liquids efficiently. Its stainless steel construction and 100 mL capacity make it suitable for clarifying solutions, particulate removal, and microbiological sample preparation.

This funnel is made to accept 47 mm filter discs, a standard size used in many lab setups. These filters (such as membrane or glass fiber filters) fit securely in the funnel, enabling accurate separation of particles from liquids under vacuum or gravity.

Constructed from high-grade stainless steel (Type 304), the funnel offers excellent chemical resistance and durability, making it suitable for use with a wide range of solvents and reagents. Stainless steel also withstands frequent cleaning and autoclaving, extending its usability compared with plastic alternatives.

Rather than relying on O-rings, this funnel uses a bayonet twist-lock sealing mechanism that securely attaches the filtering assembly without extra gaskets. This design reduces the number of parts and simplifies setup and teardown during filtration procedures.

Yes — because it’s made from robust stainless steel, the funnel is autoclavable, allowing you to sterilize it (typically at ~121 °C) before or after use. However, it is supplied non-sterile, so pre-use sterilization is recommended for sensitive biological or aseptic applications.