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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 464 results
1

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

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.

EDGE
2
Promotions Available

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

For Use With (Equipment) Tubing
Plug Material PTFE
For Use With (Application) Tubing
Autoclavable Autoclavable
3
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
4

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
5

DWK Life Sciences KIMBLE™ Stopcock Plugs
SDP

KIMBLE™ Stopcock Plugs are PTFE replacement plugs designed for use with KIMBLE™ glassware stopcocks. Each pack includes a PTFE nut, rubber washer, and PTFE washer, ensuring a reliable, chemical-resistant seal for laboratory glassware applications.

6

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

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.

7

DWK Life Sciences KIMBLE™ Replacement Stopcock
SDP

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

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
9

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.

Type Stopcock
For Use With (Equipment) In-House Fluid Transfer System
Plug Material Polypropylene
No. per Case 6
Material Polypropylene
No. per Pack 1
10

Synthware™ Replacement T-Bore Stopcock
GREENER_CHOICE

Plug has a T-shaped bore to connect any two or all three stems.

Type T-Bore Stopcock
For Use With (Equipment) T-Bore Tap
Plug Material PTFE
Material PTFE
For Use With (Application) Organic Synthesis
11

Synthware™ Straight Bore Stopcock
GREENER_CHOICE

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
12

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

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.

13

DWK Life Sciences KIMBLE™ KONTES™ PTFE Plug for Straight Bore Stopcocks, Size 2
SDP

KIMBLE™ KONTES™ PTFE Plug for Straight Bore Stopcocks, Size 2 is a replacement stopcock plug with a 1:5 taper, 11/25 mm plug size, and 2 mm bore. Made from chemically-resistant, self-lubricating PTFE for reliable, low-maintenance performance.

14

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

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

15

Synthware™ Replacement Double Oblique Bore Stopcock
GREENER_CHOICE

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