Pipe

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)"])

Several pipes in the Mutant Research Centre, Earth-92131. (TV: Proteus (episode 1) ^[+]Loading...{"timestamp":"1:12","ep":"1","1":"Proteus (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)"})