Expandable Hose as the name suggest is new type of garden hose that expands 3 times its original length when water pressure is on, and contracts to its original length when its off. This flexibility allows expandable hose to be self draining, non kinking, non twisting and non tangling garden hose.
Gate valve is another meer of shut off/on valve family. What makes this unique is its disc movement is linear. The disc is either gate or wedge-shaped, which has an effective shut-off and on mechanism. Gate valve is primarily suited for isolation.