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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 199 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.

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

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
3

Masterflex™ 3-Way Large Bore Stopcock

Perfect for handling higher flow volumes in process while using connections similar to luer systems. Cole-Parmer™ 3-Way Large Bore Stopcock is non-sterile and not approved or intended for medical, clinical, surgical or other patient oriented applications.

4

Bel-Art™ SP Scienceware™ Stopcocks

With a removable, leak-proof plug made of chemical-resistant, non-stick PTFE with barbed tubulations that accept 1/4 to 3/8 in. I.D. tubing

Autoclavable Autoclavable
5

DWK Life Sciences DURAN™ Separating Funnel Stopcock with short inlet, complete with PTFE key

For easier attachment 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
Autoclavable Autoclavable
8

GPE Scientific™ J Young Straight Through Taps, Fine Thread Type

GPE Scientific™ J Young Straight Through Taps, Fine Thread Type are made in various stopcock sizes.

Type Straight through tap, fine thread type
9

GPE Scientific™ J Young T Shape Taps, Fine Thread Type

GPE Scientific™ J Young T Shape Taps, Fine Thread Type are made in various stopcock sizes and with different side arm diameters.

Type J Young T Shape Tap, Fine Thread
10

GPE Scientific™ J Young T Bore Taps, Fine Thread Type

GPE Scientific™ J Young T Bore Taps, Fine Thread Type are made in various stopcock sizes and with different side arm diameters.

Type J Young T Bore Taps, Fine Thread
11

Azlon™ Spare Stopcock for Narrow Neck HDPE Aspirator

For use with narrow neck HDPE aspirator

Type Aspirator Stopcock
Material HDPE
12

Jaytec Glass™ PTFE Stopcock and Glass Jet

Detachable spare PTFE stopcock for compact burette, complete with borosilicate Glass Jet.

13

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
14

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
15

Thermo Scientific™ Nalgene Stopcock Assembly for Acrylic Burets
GREENER_CHOICE

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