Gardena Regulator Valve for 13mm (1/2") hose - Gardena 2977-26 Ref: GRD2977-26 Regulates or cuts off the water flow at one end of the Y-coupling. A simple pull releases the connection. List price £8.99 Grovelands Online price including Nextday Deliver £8.09 Price: £8.10 (Including VAT at 17.5%)