What basic laws of nature does plumbing follow?

• conductivity, acceleration and motion
  The basic natural laws of plumbing are gravity, pressure and water seeking its own level.
• gravity, pressure and water seeking its own level.
  The basic natural laws of plumbing are gravity, pressure and water seeking its own level.
• motion, elasticity and resilience
  The basic natural laws of plumbing are gravity, pressure and water seeking its own level.