standpipe

noun4

1. •
   A vertical pipe into which water is pumped so that a desired pressure is available at the bottom.
2. •
   A freestanding pipe fitted with a tap which is installed outdoors to dispense water for everyday use.
3. •
   The plumbing for a water supply in a building for the use of firefighters; the water supply itself (firewater).
4. •
   A vertical pipe used as an overflow protection drain in certain domestic plumbing fixtures (e.g. flush toilets).