Pipe
From Tardis Wiki, the free Doctor Who reference
The Dalek City on Skaro had a system of pipes. (TV: The Daleks [+]Loading...["The Daleks (TV story)"], The Witch's Familiar [+]Loading...["The Witch's Familiar (TV story)"])
Other realities
Earth-92131
In Earth-92131, there were several pipes in the Mutant Research Centre. (TV: Proteus (episode 1) [+]Loading...{"ep":"1","1":"Proteus (TV story)"})