#water_back__waterback  water heater consisting of a tank or pipes set at the back of a fireplace or in the firebox of a stove
  supertype:  hot-water_heater__hotwaterheater__water_heater__waterheater  a heater and storage tank for the heated water
  part of:  cookstove  a stove for cooking (especially a wood- or coal-burning kitchen stove)
  part of:  fireplace__open_fireplace__hearth  an open recess in a wall at the base of a chimney where a fire can be built
     part of:  chimney  a vertical flue that provides a path through which smoke from a fire is carried away through the wall or roof of a building

No statement uses or specializes water_back; click here to add one.