Carbon dioxide hose or CO2 hose is used to transfer both liquid and gaseous CO2. Carbon dioxide is a solid below -109 Deg. F. and becomes a gas at temperature above that figure.

Carbon dioxide is used as a refrigerant, in fire extinguishers, for inflating life rafts and life jackets, blasting coal, foaming rubber and plastics, promoting the growth of plants in greenhouses, immobilizing animals before slaughter, and in carbonated beverages.