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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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Keyword Search:
1 – 15 of 44 results
1
Promotions Available

Bel-Art™ Two-Piece Stopcocks

Two-piece design snaps together forming a tight seal, and the free-turning key needs no lubrication

Connectors Barbed
Includes Stopcock
Outlet Port Tubulated
Type 2-way Stopcock
For Use With (Equipment) Flexible plastic or rubber tubing
Plug Material HDPE
Material Polyethylene
Fits Tubing ID 12.7 mm
Pressure 7 psi
2

DWK Life Sciences KIMBLE™ Straight Bore Stopcock Plug PTFE, Size 4

KIMBLE™ Straight Bore Stopcock Plug PTFE, Size 4 is chemically resistant and self-lubricating, featuring a 1:5 taper for easier use at higher-than-ambient temperatures. Ideal as a replacement plug for KIMBLE™ straight bore stopcocks.

3
Promotions Available

Bel-Art™ Replacement Stopcocks

Polypropylene body has Teflon™ PTFE plug, washer and bright red handle

4
Promotions Available

Bel-Art™ Stopcocks

With a removable, leak-proof plug made of chemical-resistant, non-stick PTFE with barbed tubulations that accept 0.25 in. 0.375 in. I.D. tubing

For Use With (Equipment) Tubing
Plug Material PTFE
For Use With (Application) Tubing
Autoclavable Autoclavable
5

DWK Life Sciences KIMBLE™ KONTES™ PTFE Plug for Straight Bore Stopcocks, Size 6

KIMBLE™ KONTES™ PTFE Plug for Straight Bore Stopcocks, Size 6 is a replacement plug designed for 6mm bore straight bore stopcocks. Features a 1:5 taper, chemically resistant and self-lubricating PTFE construction for reliable, low-maintenance valve performance.

6

Thermo Scientific™ Nalgene™ Stopcocks
GREENER_CHOICE

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
7

DWK Life Sciences KIMBLE™ Replacement Stopcock

KIMBLE™ Replacement Stopcock is designed for use with 17062F Series Burets. Features a stopcock bore size of 2mm and is compatible with O-Ring size 109, ensuring a reliable and secure fit for laboratory burette applications.

8

DWK Life Sciences KIMBLE™ 2 mm Varibor Metering Valve Stopcock Plug

KIMBLE™ 2 mm Varibor Metering Valve Stopcock Plug allows precise delivery of preset volumes of gases or liquids to reactions. Features on/off control, inner standard taper joint, and is manufactured from low extractable borosilicate glass.

9

DWK Life Sciences KIMBLE™ KIMAX™ Buret PTFE Stopcock Assemblies

KIMBLE™ KIMAX™ Buret PTFE Stopcock Assemblies are PTFE LUBRI-FLO™ replacement stopcocks compatible with 17021H, 17800, 17810, and 29050H series burets, offering reliable, expansion-free performance and a leakproof fit.

10

DWK Life Sciences KIMBLE™ KONTES™ FlexColumn™ Three-way Luer Stopcock

KIMBLE™ KONTES™ FlexColumn™ Three-way Luer Stopcock features a heavy-duty nylon body with HDPE valve plug, offering three-way flow control with locking fittings on all ports for secure, reliable connections.

11

Thermo Scientific™ Nalgene Stopcock Assembly for Acrylic Burets
GREENER_CHOICE

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

12

DWK Life Sciences KIMBLE™ KIMAX™ Burets with Threaded Closures Replacement PTFE Stopcock Assembly

The KIMBLE™ KIMAX™ Burets with Threaded Closures Replacement PTFE Stopcock Assembly features a PTFE LUBRI-FLO™ stopcock with a 2.8 mm bore, designed for use with 29053H and 17121H burets. Nylon threaded closure (15-415 GPI) ensures secure attachment.

13

DWK Life Sciences KIMBLE™ Replacement Stopcocks for KIMAX™ Microburet with Three-Way PTFE Stopcock

KIMBLE™ Replacement Stopcocks for KIMAX™ Microburet with Three-Way PTFE Stopcock are chemically resistant and self-lubricating PTFE plugs designed for reservoir-fill burets and pipets. Each plug is furnished with a nut, rubber washer, and HDPE washer.

14

Synthware™ Straight Bore High Vacuum Glass Stopcock
GREENER_CHOICE

Plug is precision ground and hand lapped with corresponding numbers on barrel and plug.

Type Straight Bore - High Vacuum
Plug Material Glass
Material Borosilicate Glass
For Use With (Application) Organic Synthesis
15

Troemner™ Regular Hosecock, Stainless Steel

Deliver accurate regulation or interruption of fluid flow