Home Stopcocks & Stoppers
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There are four different groups of stopcocks used in most apparatus. Two of these are used in most applications. They are the all glass stopcock with interchangeable solid glass plug, used for the majority of laboraotry applications, and the glass body with teflon plug which is recommended for use where solvents are present or where grease would be a form of contamination. The other types are the all glass stopcock with hollow-blown glass plug, recommended specifically for high vacuum work and the Pyrex® brand Rotaflow™ stopcock which is an adjustable stopcock used for general purpose, positive pressure, and high vacuum work.
All stopcocks listed below are available with solid glass plug, teflon plug, or high vacuum plugs.

When ordering apparatus with stopcocks, please indicate type and bore of stopcock to be used.

STG-2400 Straight Bore Stopcock
Plug bore size in mm.: 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 15, 20, 25, 30, 35, 45.

STG-2410 Three-Way Stopcock
Plug bore sizes in mm.: 1, 2, 3, 4.


STG-2420 Three-Way T-Type Stopcock
Plug bore sizes in mm.: 1, 2, 3, 4.

STG-2430 Three-Way 120° Stopcock
Plug bore sizes in mm.: 2, 3, 4.

STG-2440 Pyrex® Rotaflow™ Stopcock
Bore can be varied from 0-12mm.


Hollow Stoppers

Penny Head Stoppers



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