Fresh Water equipment - he-ruide
This is known as a "Water Thief".  You connect the brass end to a hose and then push the green end over a water tap.  It can be a tap that doesn't have a male hose connection or one whose thread has been damaged.

This is known as a "Water Thief". You connect the brass end to a hose and then push the green end over a water tap. It can be a tap that doesn't have a male hose connection or one whose thread has been damaged.