Anti-freezing / Water Pipe

"Anti-freezing" is an extend-retract water pipe that utilizing material characteristics. As we know, the pixel density of water is 1.0g/cm3 and that of ice is 0.9g/cm3. Thus, when water in the tube is freezing in winer,
the volume of water will be extended. At such circumenstances, traditional water pipes are likely to be cracked.This design aims to prevent frost crack of watertube in freezing and chilly days.