Description

USA Lab 1L, 2L, 5L Borosilicate 3.3 Heavy Wall Filter Flask with 1/2" Barb

The USA Lab Borosilicate 3.3 Heavy Wall Filter Flask is designed to make vacuum filtration simple, dependable, and efficient. Its reinforced flask body is constructed from thick-wall Borosilicate 3.3 glass for improved durability during routine laboratory filtration applications.

Available in 1L, 2L, and 5L capacities, each flask features a 15 mm, approximately 1/2-inch, sidearm hose barb for connection to compatible vacuum tubing and filtration equipment. The wide opening accommodates appropriately sized rubber stoppers, adapters, and Büchner funnels.

Offering reliable performance at a competitive price point, this heavy-wall vacuum filter flask is well suited for laboratories, universities, research facilities, botanical processing, chemical testing, and general filtration workflows.

The mouth opening may range from 36 mm to 40 mm due to manufacturing fluctuations.
Confirm stopper and Büchner funnel compatibility before purchasing.

Borosilicate 3.3 Glass Heavy-Wall Construction 1/2" Hose Barb 1L, 2L & 5L Sizes

Capacities: Available in 1L, 2L, and 5L sizes.

Sidearm Barb: 15 mm or approximately 1/2" for vacuum tubing connections.

Glass Construction: Thick-wall Borosilicate 3.3 laboratory glass.

Why buy from USA Lab

Expert Support
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Nationwide 1-2 day shipping.

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Why choose this heavy wall filter flask?

Durable glass construction — thick-wall Borosilicate 3.3 glass provides dependable performance for routine filtration.
Vacuum-ready sidearm — the 15 mm, approximately 1/2-inch, hose barb connects to compatible vacuum tubing.
Multiple capacity options — select from 1L, 2L, and 5L sizes to match your filtration volume.
Versatile laboratory use — suitable for vacuum filtration, sample preparation, liquid separation, and general research workflows.
Competitive value — reliable laboratory glassware offered at an accessible price point.

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Get help selecting compatible vacuum tubing, stoppers, Büchner funnels, and filtration equipment.

Call 734-855-4890

Technical Specifications

Specification	USA Lab Heavy Wall Filter Flask
Product Type	Heavy-Wall Vacuum Filter Flask
Material	Borosilicate 3.3 Glass
Construction	Thick-Wall Laboratory Glass
Available Capacities	1L, 2L, and 5L
Barb Size	15 mm or Approximately 1/2"
Mouth Opening	Approximately 36 mm to 40 mm
Connection Type	Sidearm Hose Barb
Primary Application	Vacuum Filtration
Compatible Accessories	Properly Sized Stoppers, Büchner Funnels, Vacuum Tubing, and Vacuum Pumps
Glass Color	Clear
Temperature Resistance	Suitable for Standard Borosilicate Laboratory Applications
Sizing Notice	Mouth Diameter May Vary Due to Manufacturing Fluctuation
Brand	USA Lab

Popular Industries & Use Cases

Botanical Extraction Pharmaceutical Chemical Sciences Academic & Research

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We’ll help spec the right filtration equipment and accessories for your process.

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FAQ

What sizes are available?

The USA Lab 1L, 2L, 5L Borosilicate 3.3 Heavy Wall Filter Flask with 1/2" Barb is available in 1-liter, 2-liter, and 5-liter capacities.

What size is the hose barb?

The USA Lab 1L, 2L, 5L Borosilicate 3.3 Heavy Wall Filter Flask with 1/2" Barb features a 15 mm sidearm barb, which is approximately 1/2 inch in diameter.

What is the mouth opening diameter?

The mouth opening on the USA Lab 1L, 2L, 5L Borosilicate 3.3 Heavy Wall Filter Flask with 1/2" Barb may range from approximately 36 mm to 40 mm due to normal manufacturing fluctuations. Verify stopper and Büchner funnel sizing before ordering.

What is this filter flask used for?

The USA Lab 1L, 2L, 5L Borosilicate 3.3 Heavy Wall Filter Flask with 1/2" Barb is designed for vacuum filtration, liquid separation, sample preparation, and other laboratory filtration applications when connected to compatible tubing, a vacuum source, a stopper, and a Büchner funnel.

Important Shipping Notice!

DISCLAIMER:

All items are carefully packaged to ensure safe delivery. In the rare event that your item arrives damaged, please notify us within 3 days of receipt. We will promptly provide a replacement or issue a refund.

Please note that any damage occurring after delivery is not covered under warranty. We appreciate your understanding and your trust in our products.

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Specifications

MPN:	Filter Flask 1/2"
Brand:	USA Lab Equipment

Shipping & Returns

1–3 Business Days Standard Processing

Return Policy ↗ Varies by Product Warranty Policy ↗ Varies by Product

3 Days to Claim Inspect on Arrival

Shipping

Orders ship within 1–3 business days after payment clears. We ship Monday through Friday via UPS, USPS, and freight carriers.
Freight items (crated, hazmat, dropship, or special packaging) can take 1–5 business days to ship.
Expedited shipping speeds up transit, not processing. Contact us for true rush orders.
PO Box addresses ship USPS. Alcohols, chemicals, and hazmat cannot ship to a PO Box.

Full Shipping Policy

Delivery & Damage Claims

Inspect every shipment on arrival. Claims must be filed within 3 business days.
Visible damage? Refuse the delivery and have the driver document it. We will file the claim and ship a replacement.
Concealed damage: contact us within 2 days with photos of the packaging and item. Keep all packing materials.
Freight services (liftgate, residential, inside delivery) are the customer's responsibility to select for their location.

Damage & Freight Details

Returns

USA Lab branded products are returnable within 30 days of order date with prior authorization. Email us before sending anything back.
Solvents, chemicals, and consumables are not returnable once shipped. Custom and made-to-order items are final sale.
Unused items in original packaging carry a 15% restocking fee. Defective items ship back on us.
Items showing any signs of use, wear, contamination, or modification are not eligible for return.
Glassware damage must be reported within 3 business days of delivery for replacement or refund.

Full Return Policy

Custom & Made-to-Order Items

Customized and made-to-order products are final sale and not eligible for return under any circumstances.
This includes ductless fume hoods, configured tanks and reactors, and any item built to your specifications.
These products are manufactured specifically for your application. Confirm sizing, voltage, and configuration with our team before ordering.
Damage claim coverage still applies. Inspect on arrival and report issues within 3 business days.

Return Eligibility Details

Warranty

USA Lab products are covered against manufacturing defects for up to 3 years, depending on product line.
1 year: chillers, heaters, rotovaps, reactors, vacuum ovens, mixers, and most equipment. 2 years: UVP vacuum pumps. 3 years: scientific freeze dryers.
Wear items (glassware, gaskets, heating elements, sensors) and fittings/steel are not covered. Report defects within 30 days (3 days for glass).
Non–USA Lab brands are covered by their manufacturer's warranty. See the product's Warranty tab.

Full Warranty Policy

International Orders

Import duties, taxes, VAT, and brokerage fees are not collected by USA Lab and are the receiver's responsibility.
Verify your country's customs charges and import restrictions before ordering.
Refused or unclaimed international shipments are refunded minus shipping and a 15% restocking fee.
International orders are generally non-returnable. Damaged items must be reported within 3 business days.

International Guidelines