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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 436 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.

EDGE
Outlet Port Tubulated
Type Stopcock
Plug Material Polypropylene
Material Polypropylene
2

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

Heavy-duty nylon

EDGE
3

Corning™ PYREX™ Plain Bore Rotaflo™ Stopcock

Combined PTFE and borosilicate glass forms a leak- and freeze-resistant seal

Type High Vacuum Stopcock
Temperature (English) -4°F to 392°F
Temperature (Metric) -20°C to 200°C
No. per Case 1/Cs.
Material Glass
No. per Pack 1/Pk.
4

DWK Life Sciences Kimble™ Stopcock Plugs
SDP

Parts: PTFE nut, rubber washer and PTFE washer

5

DWK Life Sciences Kimble™ KIMAX™ Buret PTFE Stopcock Assemblies
SDP

For 03-700-12 Series burets.

6

DWK Life Sciences Kimble™ Kontes™ PTFE Plug for Straight Bore Stopcocks, Size 2
SDP

PTFE Stopcock Plug size 11/25 for 2mm bore size

7

DWK Life Sciences Kimble™ Kontes™ PTFE Plug for Straight Bore Stopcocks, Size 6
SDP

PTFE Stopcock Plug size 16/35 for 6mm bore size

8

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
9

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

For use with Kimax™ Microburet.

10

DWK Life Sciences Kimble™ Replacement Stopcock
SDP

Replacement for 17062F Series Burets

11

DWK Life Sciences Kimble™ 2 mm Varibor Metering Value Stopcock Plug
SDP

Allows delivery of preset volumes of gases or liquids to reactions using the needle value

12

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

Replacement stopcock for educational buret 17121H.

13

DWK Life Sciences Kimble™ Straight Bore Stopcock without plug, 4mm
SDP

Straight-bore, sandblasted stopcock with a 1:5 taper.

14

Thermo Scientific™ Nalgene Stopcock Assembly for Acrylic Burets
GREENER_CHOICE

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

15

Bel-Art™ SP Scienceware™ Two-Piece Stopcocks

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

Connectors Barbed
Type 2-piece
For Use With (Equipment) Flexible plastic or rubber tubing
Material Polyethylene
Fits Tubing ID 12.7 mm
Pressure 7 psi