standpipe

Short definition from Wiktionary

Noun

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