1.   25FT: the original length is 2.5m, and the extension is 7.5m after water injection.

      50FT: the original length is 5m, and the extension is 15m after water injection.

      75FT: the original length is 7.5m, and the extension is 22.5m after water injection.

      100FT: the original length is 10m, and the extension is 30m after water injection.

2.   Automatic expansion after water injection.

      Automatic drainage shrinkage after closing water.

      Note: the extension length of the water pipe is related to the water pressure. The greater the water pressure, the better the stretching effect.