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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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Autoclavable

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1 – 15 of 443 results
1

Bel-Art™ Stopcocks
GSA_VA

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

EDGE
For Use With (Equipment) Tubing
Plug Material PTFE
For Use With (Application) Tubing
Autoclavable Autoclavable
2

DWK Life Sciences Kimble™ Kontes™ FlexColumn™ Three-way Luer Stopcock
SDP

Heavy-duty nylon

EDGE
3

DWK Life Sciences Kimble™ Replacement Stopcock
SDP

Replacement for 17062F Series Burets

4

Synthware™ Replacement Double Oblique Bore Stopcock
GREENER_CHOICE SDP

Double Oblique Bore Stopcock has diagonal, parallel bores to allow connection of single stem to both stems on the opposite side.

Type Double Oblique Stopcock
Plug Material PTFE
Material Borosilicate Glass
For Use With (Application) Organic Synthesis
5

Synthware™ Oblique Bore Hollow Plug High Vacuum Stopcock
GREENER_CHOICE SDP

Stem OD: 10 or 16 mm, with hollow plug, Precision ground with corresponding numbers on the barrel and the plug.

Type Oblique, Hollow, High Vacuum
Plug Material Glass
Material Borosilicate Glass
For Use With (Application) Organic Synthesis
6

Bel-Art™ Replacement Stopcocks

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

7

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

This PTFE stopcock is chemically-resistant and self-lubricating

8

DWK Life Sciences Kimble™ Stopcock Plugs
SDP

Parts: PTFE nut, rubber washer and PTFE washer

9

Thermo Scientific™ Nalgene™ Three-way Stopcock
GSA_VA GREENER_CHOICE

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
10

Thermo Scientific™ Nalgene™ Stopcocks
GSA_VA GREENER_CHOICE

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
11

DWK Life Sciences Kimble™ Kontes™ Stopcock Valve for Microscale Organic Chemistry Kit
SDP

One-way stopcock valve made of nylon body and HDPE plug

12

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
13

Synthware™ Straight Bore Stopcock
GREENER_CHOICE SDP

Straight Bore Stopcock with a threaded pressure nut. Stopcock barrels are polished to prevent leakage due to uneven surfaces.

Type Straight Bore Stopcock
Plug Material PTFE
Material Borosilicate Glass
For Use With (Application) Organic Synthesis
Autoclavable Autoclavable
14

Synthware™ Double Oblique Bore PTFE Stopcocks
GREENER_CHOICE SDP

Double Oblique Bore Stopcocks have diagonal, parallel bores to allow connection of single stem to both stems on the opposite side.

Type Double Oblique Stopcock
Plug Material PTFE
Material Borosilicate Glass
For Use With (Application) Organic Synthesis
15

Synthware™ Replacement for T-Bore Glass Stopcock, Plug ONLY
GREENER_CHOICE SDP

Glass plug ONLY.

Plug Material Glass
Material Borosilicate Glass
For Use With (Application) Organic Synthesis