Water from washbasin sinks and water from galley (kitchen) sinks is drained out of the aircraft just as in offices and homes - immediately. There are some situations when water is to be drained only at a time selected by the crew or user. Such drains will have water drain valves which will open only on selection. read more
The ability to drain and pull samples from aircraft fuel systems is an important part of the fuel systems design. AVI has been designing sampling and drain valves for nearly 60 years. Many of the early valve designs were so well engineered they are still in use today. read more