Filter Flask – 250ml with 24/29 Joint (Borosilicate Glass)

The 250ml Filter Flask with 24/29 Joint is a high quality piece of laboratory glassware designed for vacuum filtration and separation procedures in educational and professional science laboratories. Manufactured from premium 3.3 borosilicate glass, this flask provides excellent resistance to heat, thermal shock, and chemical attack.

Designed with an integrated side arm and a standard ground glass joint (24/29), the flask connects securely to Büchner funnels and vacuum systems, creating an airtight seal for efficient filtration. The 250ml capacity makes it ideal for small to medium volume filtration tasks commonly undertaken in school laboratories and preparation rooms.

Robust, clearly visible, and compatible with standard laboratory apparatus, this filter flask is built to withstand repeated use in busy teaching environments while maintaining reliable performance.

Key Features

• 250ml capacity – ideal for routine vacuum filtration
• Manufactured from 3.3 borosilicate glass
• Standard ground glass joint for secure connections
• Joint size: 24/29
• Excellent heat and chemical resistance
• Designed for use with Büchner funnels and vacuum systems
• Durable construction for repeated laboratory use
• Supplied as 1 × 250ml filter flask

Ideal for School Science Lessons

Ideal for GCSE and A Level science lessons, this Filter Flask supports the teaching of key laboratory techniques involving separation and purification.

• Carrying out vacuum filtration in chemistry experiments
• Separating solids from liquids efficiently
• Demonstrating correct use of Büchner funnels and filter paper
• Teaching safe assembly of jointed glassware systems
• Routine use in school laboratories and science prep rooms

Strong, reliable, and compatible with standard filtration equipment, this 250ml Filter Flask is an essential item of laboratory glassware that supports safe, effective, and engaging practical science teaching in educational environments.