Our ID100 Insulated Water Trough (100L/22 Gal) is designed with a thick layer of high density polyurethane insulation foam positioned between two polyethylene walls that maintain water at an optimum temperature in extreme climatic conditions. This design ensures that water will remain available for animals in sub-zero temperatures and will continue to work in conditions as low as –30 Degrees without the need of electricity. Animals access the water by pushing down on the white float and the secure chamber can be easily accessed for servicing.