washstand

noun2

1. •
   A table containing a basin and a pitcher of water for washing.
2. •
   (old-fashioned) In a stable or garage, a place in the floor prepared so that carriages or automobiles may be washed there and the water run off.

   • Washstand in an Electric Garage. […] In a few garages arrangements are made for washing cars in any position on the storage floor, so that it is not necessary to move them on to and off the washrack. — 1916