Hozelock 4mm Flow Control Valves (Set of 2) – Control valve to shut off and control the water flow in a 4mm micro tube irrigation systems Control water flow or switch off supply entirely. Install in place of an end plug for system flushing or isolate water flow in irrigation zones. Ideal for isolating areas of an irrigation system and reducing flow. UV resistant design for improved performance and durability The valve allows the flow rate to be reduced and customised to a plant’s consumption requirements in an irrigation zone On-off device to control the water flow in irrigation systems Simple on-off operation and straight through flow UV stabilised materials for long life. Always install as an in-line valve with tubes connected to both inlet and outlet.