For the disposal of waste water from an aircraft, a pipe socket for receiving a connection coupling is provided at a lower part of the aircraft body or fuselage. The pipe socket has a standard size and a standard construction.

The pipe socket has a diameter of 4 inches, about 10,2 cm. For carrying out the drainage or disposal, a connection with a hose is established from the outside, which hose has an inner diameter of about 4 inches, about 10,2 cm.

The disposal process is started by connecting the hose to the aircraft from below for example by a threaded coupling device, after which the drainage can be carried out.

dimensions to ISO R47.

Distinctive yellow or red or orange coloring for high visibility