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Stopcocks

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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1 – 15 of 206 results
1

Masterflex™ 4-way Stopcock

Use these stopcocks for a variety of applications. Cole-Parmer™ 4-way Stopcocks feature a PC body and an HDPE stem.

EDGE
Outlet Port Male Luer Lock or A Male Luer Slip
Type Stopcock
Plug Material Polycarbonate and HDPE
Material Polycarbonate,HDPE
2

BRAND™ PTFE Stopcock with Screwings and Sealings

PTFE Stopcock with screwings and sealings for use with compact and automatic burettes.

3

DWK Life Sciences DURAN™ Separating Funnel stopcock Gilson, complete with PTFE key

For attaching to DURAN™ separating funnel raw bodies.

Material Borosilicate Glass (3.3), PTFE
No. per Pack 25/Pk.
For Use With (Application) For attachment to DURAN™ separating funnel raw bodies; For the production of separating funnels according to Gilson
Width (Metric) 1.8 mm
5

Azlon™ Spare Stopcock for Narrow Neck HDPE Aspirator

For use with narrow neck HDPE aspirator

Type Aspirator Stopcock
Material HDPE
6

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
7

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
8

Thermo Scientific™ Nalgene Stopcock Assembly for Acrylic Burets
GREENER_CHOICE

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

9

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
10

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
12

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
13

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
14

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
15

BRAND™ Needle-Valve Stopcock and Spare Spindle

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