 Item number SCP-15 Object Class, Euclid Special Containment Procedures SCP-15 is impossible to move and is contained on-site. A gap of at least 2 meters or 6 feet needs to be maintained around the entire structure containing SCP-15 at all times, and no structures of any kind are to make contact with SCP-15's current containment structure. Exploration is permissible, but only in teams of three with full safety lines and GPS tracking. Any protrusions from SCP-15 must be capped and sealed immediately, with the new site recorded and logged. No aggressive action is to be made with an SCP-15. No hand or power tools are allowed anywhere inside SCP-15. No repairs or maintenance are to be made anywhere on SCP-15. Description, SCP-15 is a mass of pipes, vents, boilers, and other various plumbing apparatus, completely filling a warehouse in... The pipes appear to grow when not under observation, attempting to connect to nearby structures via sewer systems and underground plumbing. SCP-15 contains, at current estimate, over 190 kilometers or 120 miles of pipes, ranging in diameter from 2.5 centimeters to over one meter. Some pipes appear new, while others are rusted and leaking. Pipes have been reported as being made of bone, wood, steel, pressed ash, human flesh, glass, and granite. No pipes composed of lead, PVC plastic, copper, or any other traditional material for the production of pipes have been found. SCP-15 reacts to tools and aggression. Any personnel acting violently, carrying tools, or attempting to damage or repair SCP-15 in any way, will trigger a reaction. Any pipes near the subject will burst, spraying on the subject for several seconds before the flow suddenly stops. Pipes have been reported containing oil, mercury, rats, a species of insect not yet identified, ground glass, seawater, entrails, and molten iron. Pipes will continue to burst around the subject until death or retreat. SCP-15 was cut back to its current structure after attaching to 11 other structures in the area. Currently, 11 personnel have been killed and 20 more are still missing. Reports have been made of banging and screaming coming from within SCP-15. Lesson complete. If you missed the previous orientation, go watch SCP-14, the Concrete Man, right now. Or for the complete course, watch this playlist.