Also known as dry disconnects and double shut-off couplings, these have a shut-off valve in the plug and the socket for minimal fluid loss when disconnecting the hose line. A complete coupling consists of a plug and a socket (both sold separately) that allow you to quickly connect and disconnect medium-to large-diameter hose lines. To connect, insert the plug into the socket, press the locking levers down, and turn the handle to the open position. The locking levers prevent accidental disconnection. To disconnect, turn the handle on the socket to the closed position, lift both locking levers, and pull out the plug. The plug and socket cannot be disconnected when the valves are open. They are not compatible with any other style of coupling. Plugs and sockets are aluminum, which is lightweight with good corrosion resistance.

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

Warning: Relieve all pressure before disconnecting the couplings. Do not use cam-and-groove couplings with compressed air or gas.