A slim body allows these couplings to fit into tight spaces. A complete coupling consists of a plug and a socket (both sold separately) that connect and disconnect quickly. Use them if you need frequent access to a line. All Compact plugs are compatible with any of the Compact sockets of the same coupling size, regardless of the pipe size or barbed hose ID.

Plugs are also known as nipples.

Sockets have a shut-off valve that stops the flow when the coupling is separated, so air won’t leak from the line. They are push-to-connect style. To connect, push the plug into the socket until you hear a click. To disconnect, slide the sleeve on the socket forward until the plug ejects.

Plugs and sockets with a barbed end insert into plastic or rubber hose and secure with a crimp-on hose ferrule.

Zinc-plated steel is stronger and more durable than brass. It has fair corrosion resistance, so it should be used primarily in dry environments. Brass is softer than zinc-plated steel, so it’s easier to thread together. It offers good corrosion resistance.

NPTF (Dryseal) threads are compatible with NPT threads.

Note: To ensure a correct fit, make sure that the plug and socket have the same coupling size.