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Stopcocks

Stopcocks work as valves, serving to regulate, interrupt or completely stop the flow of a gas or liquid through piping, tubing or a faucet, with tubes attached to the stopcock’s female joint easily separated or connected by a turn of the stopcock. Stopcocks may be held in place by vacuum, rubber rings or clips. Glass stopcocks need stopcock grease for lubricating and sealing the plug and shell. Glass stopcocks with plastic plugs are sealed without grease but are less effective for high vacuum. Plastic plug glass stopcocks, however, work well for low vacuum applications.
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Search Within Results
Keyword Search:
1 – 15 of 230 results
1

Masterflex™ Stopcocks with Luer Connections

Regulate flow without any leaking using these fittings. Cole-Parmer™ Stopcocks with Luer Connections are available with either a male luer lock or a male luer slip.

EDGE
Type Stopcock
Plug Material Polycarbonate and HDPE
Material Polycarbonate,HDPE
2
Promotions Available

Thermo Scientific™ Nalgene™ Stopcocks

Develop in-house fluid transfer systems for accurate filling or dispensing. These stopcocks provide reliable, accurate liquid flow control.

EDGE
Type Stopcock
For Use With (Equipment) In-House Fluid Transfer System
Plug Material Polypropylene
No. per Case 6
Material Polypropylene
No. per Pack 1
3
Promotions Available

Thermo Scientific™ Nalgene™ Three-way Stopcock

Experience in-house fluid transfer system flexibility with this three-way stopcock, arranged in a T-shape to simply any two — or all three — arms of the stopcock with ease.

EDGE
Outlet Port Tubulated
Type Stopcock
Plug Material Polypropylene
Material Polypropylene
4
Promotions Available

Gosselin™ Winged Plug

Suitable for different usage of tubes and applications

EDGE
5

Fisherbrand™ PTFE Burette Stopckcock, Straight Through Type

Fisherbrand™ PTFE Burette Stopckcock, Straight Through Type supplied with 8mm diameter sidearm in borosilicate glass, bore is 2mm.

Plug Bore 2 mm
Temperature (Metric) -200°C to +280°C
Diameter (Metric) 8 mm
Material PTFE
6

Cowie Technology™ PTFE T-Type Stopcocks

Cowie Technology™ PTFE T-Type Stopcocks feature a pure PTFE body and plug and combine all the desirable properties of the Ultimate Laboratory Stopcock.

Includes Borosilicate glass sidearms
Type T-Type
Description T-Type Stopcock
Plug Material PTFE
Material PTFE
No. per Pack 1 Each
Autoclavable Autoclavable
8
Promotions Available

Thermo Scientific™ Nalgene Stopcock Assembly for Acrylic Burets
GREENER_CHOICE

For use with 25 mL Acrylic Nalgene Break-Resistant Burets.

9
Promotions Available

BRAND™ PTFE/ Polypropylene T-bore Stopcock

PTFE construction with polypropylene valve lever. Provides outstanding chemical resistance. Includes integrated hose nozzles.

Includes Integrated hose nozzle
Plug Material Polypropylene
Material PTFE
10

Pyrex™ Borosilicate Glass Aspirator Stopcock with Ground Cone

Inserts into the ground glass side-socket of an aspirator botte. Pyrex™ Borosilicate Glass Aspirator Stopcock with Ground Cone provides a leakproof seal.

Type Aspirator Stopcock
For Use With (Equipment) Aspirator bottles 1541 and 1569
Material Borosilicate Glass
12
Promotions Available

Pyrex™ Borosilicate Glass High Vacuum Double Bore Stopcock

Constructed of Borosilicate glass. Pyrex™ Borosilicate Glass High Vacuum Double Bore Stopcock keys and barrels are precision ground together in matched pairs for optimum performance. Each key and barrel are numbered to ensure they are always paired together. All side-arms are 100mm in length.

Description Sidearm Wall Thickness: 1.5mm
Length (Metric) 100 mm
Material Borosilicate Glass
13

Pyrex™ Straight Bore Borocilicate Glass Stopcocks

Specially designed and carefully manufactured for high vacuum applications.

Type Glass Stopcock
Material Borosilicate Glass
14

BRAND™ Needle-Valve Stopcock and Spare Spindle

Needle-Valve Stopcock and Spare Spindle constructed of PTFE with retention device.

15
Promotions Available

BRAND™ Straight-Bore PTFE Stopcocks

PTFE construction with polypropylene valve lever. Provides outstanding chemical resistance. Includes integrated hose nozzles.

Includes Integrated hose nozzle
Plug Material Polypropylene
Material PTFE