Brass Stop Cocks | McMaster-Carr

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133 Products

Control of Liquids, Gases, and Solids

On/Off Valves with Luer Lock Fittings

With just a half turn or a light push, these valves connect to luer lock fittings on your line.

Compact Threaded On/Off Valves

Install these valves in tight spots, such as where pipelines are crowded together. They’re less than half as long as standard threaded valves and one-third shorter in height. Use with water, oil, air, and inert gas.

On/Off Valves with Barbed Fittings

These valves have barbs that grip onto tubing, providing a secure hold. Because they’re made of metal, they are more durable than plastic valves and withstand higher temperatures.

On/Off Valves with Compression Fittings

Made of metal, these valves are more durable than plastic valves and withstand higher temperatures. A compression sleeve bites into tubing as you tighten the nut, forming a strong seal.

Compact Threaded On/Off Valves for Fuel

A low-profile handle allows these valves to fit in low-clearance pipelines for diesel fuel, fuel oil, and kerosene.

Drain Valves

Also known as stop cocks, install these valves on your tank for easy draining of air or fluid.

High-Temperature Drain Valves

Empty fluid from tanks in boiler rooms or heat transfer systems—these valves withstand higher temperatures than our other drain valves. Also known as stop cocks.

Laboratory Valves

Laboratory Flanges and Turrets

Provide a connection for hose cocks, needle valves, and nozzles by attaching these flanges and turrets to your supply pipe.