The Hozelock AquaStop Connector has an internal valve that stops the water flow when an accessory (e.g. a spray gun) is disconnected. This saves you having to go back to the tap to turn the water off when you are switching between accessories. It also helps you save water in the garden because it stops the water flow so less water is wasted. The flexible hose-tall reduces stress at the connection point to help reduce hose kinking, swelling and leaking.