This great looking Gulfstream G550 A6-YMA is seen landing at Bern in Switzerland. I have never seen this before: The aircraft is doing a water system purge! This process begins at least 20 minutes prior to landing. All the valves from the lavatory faucet, the galley faucet and even the galley coffee maker are opened to allow residual water to drain out and let air in. Upon landing, the V2 valve will move to the drain position and all system valves will open to allow all supply and drain lines to empty – that is what we see in this video! A complete water system purge is done anytime the temperature is below freezing to avoid damage (freeze and burst) when the aircraft is parked e.g. overnight.
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Video Editing Software: Final Cut Express and iMovie
Camera: Sony RX10 IV