Description
3-Way stopcock Czako with bent tube connectors NS 18,8 is a precision laboratory glass stopcock built to DIN 12563 for controlled multi-path fluid routing. It combines a solid NS plug with bent tube connectors sized 9 × 100 mm and a bore of 2,5 mm, giving a compact, leak-resistant junction for cone-joint glassware. The NS 18,8 ground joint ensures interchangeability with matching laboratory apparatus while the solid plug provides stable sealing under typical bench conditions. This three-way Czako design from manufacturer Witeg supports direction switching and isolation in synthesis lines, distillation setups and general analytical glass assemblies. Supplied as a single piece with a net weight of 0,085 kg, the stopcock integrates readily into modular glass manifolds where bent outlets help keep tubing runs short and organised. Its defined bore geometry and robust cone geometry make it a practical choice for routine chemical handling, sample transfer and apparatus construction in research and quality-control laboratories that rely on standardised NS joints.
This article is part of Stopcocks & valves, in Tubing, hoses & fittings.
Key features
- Pack size: 1 pc
- Joint size: NS 18,8
- Bore diameter: 2,5 mm
- Connector dimensions: 9 x 100 mm
- Plug type: Solid NS plug
- Standard: DIN 12563
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Questions about Stopcock, Czako, three-way, ST 18,8, w
What is this article?
Stopcock, Czako, three-way, ST 18,8, w is the article on this page. Luminix Health distributes Witeg for laboratory use. It sits in Stopcocks & valves, inside Tubing, hoses & fittings, in Labware.
A stopcock opens and closes a line, or directs it between ports. Glass stopcocks have a ground plug that needs grease or a PTFE key. The bore decides the flow. A two-way and a three-way key are different parts.
Tubing is how a liquid or a gas moves between two vessels without being poured. Silicone stays flexible and survives repeated autoclaving. PTFE resists almost every solvent and is stiff. PVC is the ordinary flexible line for water and for mild aqueous work. The fitting, not the tube, is what usually leaks: the barb, the thread and the stopcock have to match the tube bore. Glass and plastic apparatus around these lines is indexed under ISO laboratory ware.
Which category should I open next?
The category is Tubing, hoses & fittings. The sub-category is Stopcocks & valves. The catalogue is Labware.
Shelves beside this one are Hose connectors, adapters & fittings, PVC, PTFE & other tubing, Silicone tubing and Tubing accessories.
What should I check before I order?
When this page shows a safety data sheet, use that manufacturer file. Hazard text does not belong in the sales description. For a pack size, a grade or a certificate that is not on the page, send a quote request or contact the team.
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Luminix Health distributes this article from the heart of Europe. Articles in stock ship within 2–5 business days. Standard delivery is free from €250 excl. VAT. Cold-chain goods and dangerous goods under ADR are never included in that free delivery. The terms are in the Shipping Policy. The full brand index is on shop by brand. Who we are is on about us.
Which other categories should I open?
The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.