Filter Flasks

Filter Flasks From USA Lab

Heavy-Duty Glassware for Vacuum Filtration and Separation

Filter flasks are built to handle the pressure and precision required in vacuum filtration. USA Lab offers a full selection of heavy-wall borosilicate glass filter flasks, Erlenmeyer-style vessels, and complete filtration kits designed for chemical, biological, and analytical labs.

Crafted for Vacuum Filtration Performance

Borosilicate 3.3 Glass

Resists cracking under vacuum pressure and exposure to harsh solvents, providing a filtration flask that performs reliably during repeated suction cycles and chemical cleanups.

Heavy-Wall Construction

Reinforced glass walls add extra strength and long-term durability to maintain its shape and integrity even during deep vacuum work.

Barb Fittings or Joint Options

Connect easily to vacuum tubing or filtration assemblies for quick setup using standard hose barbs or ground-glass joints for tighter, sealed systems.

Tapered Erlenmeyer Shape

Provides better stability on the bench and minimizes splashing during filtration, keeping liquids contained while improving handling and safety.

Available as Complete Kits

Choose all-in-one systems with funnels, stoppers, and connectors for a ready-to-use setup that simplifies liquid filtration and reduces the need to source separate components.

Compare Filter Flask Options

Practical Setup and Operation

• Quick connection options — Use either barb fittings or glass joints for easy vacuum integration.
• Stable base design — Wide bottoms keep flasks steady during suction or liquid transfer.
• Clear volume markings — Simple to read for measuring filtrate volume at a glance.
• Reusable and easy to clean — Borosilicate glass resists staining and cleans quickly between uses.

Selecting the Right Filter Flask for Your Lab

• Doing everyday vacuum filtration? → Choose a 1L or 2L heavy-wall filter flask.
• Handling corrosive or solvent-heavy samples? → Go with borosilicate 3.3 glass for chemical resistance.
• Need an all-in-one setup? → The USA Lab filtration kits include everything for quick assembly.
• Running high-volume separations? → Pick the 5L flask for larger batch processing.

Why Choose USA Lab Filter Flasks

1. Reinforced borosilicate construction rated for vacuum filtration.
2. Available in multiple sizes and connection types.
3. Complete kits streamline setup and ensure compatibility.
4. Supported by USA Lab's U.S.-based customer service and fast shipping.

Equipment That Works With Your Filter Flasks

Pair your filter flask or kit with:

• Vacuum pumps to provide consistent suction for reliable filtration speed
• Buchner funnels to fit directly into stoppers or joints for solid-liquid separations
• Rubber tubing and clamps for a secure vacuum connection
• Cold traps to capture vapors before they reach the vacuum pump