Glass Vacuum Filtration Kit
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Product Code : SCL-F-10365
Quick answer: This vacuum filtration assembly uses a fitted 40/38 ground-glass joint to connect the filter funnel to the receiving flask, in place of a rubber stopper interface, giving a more stable, leak-resistant seal for repeated vacuum filtration work.
| Specification | Detail |
|---|---|
| Product | Glass Vacuum Filtration Kit, 40/38 Glass Joint |
| Connection | 40/38 ground-glass joint (cone and socket) |
| Filtration type | Vacuum-assisted solid-liquid separation |
Glass Joint vs. Rubber Stopper Connection
A fitted 40/38 glass joint gives a more stable, precisely matched seal than a rubber stopper, and avoids the risk of a stopper perishing or being attacked by certain solvents over repeated use — a consideration for labs running vacuum filtration frequently or with more aggressive reagents. The trade-off is that a glass-joint kit only connects to other glassware sharing the same 40/38 joint size, whereas the Glass Vacuum Filtration Kit with Rubber Stopper elsewhere in this range is more universally compatible across mismatched glassware. Buyers should confirm their existing glassware's joint size before ordering the glass-joint version.
Frequently Asked Questions
What is the 40/38 glass joint?
A standard ground-glass cone-and-socket joint size that connects the filter funnel to the receiving flask, giving a fitted, stable seal for vacuum filtration.
Why choose a glass joint over a rubber stopper?
A glass joint gives a more stable, leak-resistant seal and avoids the stopper perishing or being attacked by certain solvents over repeated use.
Will this kit fit my existing filter flasks?
Only if they share the same 40/38 joint size. Confirm your existing glassware's joint size at enquiry stage, or consider the rubber-stopper version for broader compatibility.
Related Products
Explore more from the Funnel range: Glass Vacuum Filtration Kit with Rubber Stopper, Buchner Funnel with Sintered Disc, and the full Laboratory funnel category.
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Last updated: September 2026.
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