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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 196 results
1

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.

Outlet Port Tubulated
Type Stopcock
Plug Material Polypropylene
Material Polypropylene
2

Thermo Scientific™ Nalgene™ Stopcocks

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

Type Stopcock
For Use With (Equipment) In-House Fluid Transfer System
Plug Material Polypropylene
No. per Case 6
Material Polypropylene
No. per Pack 1
4

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
5

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
6

DWK Life Sciences DURAN™ Capillary-Single way Stopcock, complete with PTFE key

Shut-off with PTFE plug for grease free operation.

Material Borosilicate Glass (3.3), PTFE
No. per Pack 50/Pk.
For Use With (Application) Installation in glass apparatus and devices
Autoclavable Autoclavable
8

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.

Outlet Port Male Luer Lock or A Male Luer Slip
Type Stopcock
Plug Material Polycarbonate and HDPE
Material Polycarbonate,HDPE
9

Azlon™ Spare Stopcock for Narrow Neck HDPE Aspirator

For use with narrow neck HDPE aspirator

Type Aspirator Stopcock
Material HDPE
10

Thermo Scientific™ Nalgene Stopcock Assembly for Acrylic Burets
GREENER_CHOICE

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

11

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
12

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
13

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.

Type Stopcock
Plug Material Polycarbonate and HDPE
Material Polycarbonate,HDPE
14

Lenz Laborglasintrumente™ Glass Stopcock Plug

Solid glass plug with screwthread retaining device

Material SBW
No. per Pack 1
15

BRAND™ Needle-Valve Stopcock and Spare Spindle

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