Iskalon's pump station #2335DA was a plasma conduit situated 3,121.7 meters beneath the sea on the planet Iskalon 3,121.7. Queen Maz Kanata, the pirate, stashed some of the loot from her time as a pirate at this location, and included a antitamper sub-space alarm. When she started to pen the tome that would eventually be called the Smuggler's Guide, the alarm protecting the stash had not been triggered. Because of energy disruption, the treasure could not be found from the outside, and the fluidic pressure prevented access from the inside.
The first time Iskalon's pump station #2335DA appeared was in Star Wars: Smuggler's Guide, a reference work authored by Daniel Wallace and published in 2018.