Functions at optimal pressures around 2.0 Bar to maintain water pressure within the system and prevent the main irrigation pipe network and droppers from being drained of water when the system is not operational. This water-saving component not only ensures the system is ready to use at all times without having to wait for pipes to fill but also ensures uniform application of water across the greenhouse is maintained as soon as the system starts.

Installing a drain valve before every spinet sprinkler prevents damaging water hammer by ensuring there is only water in the pipes rather than air. Drain valves eliminate the risk of air compressing within the system that produces shock waves and momentary pressure surges capable of damaging pipework, fittings and valves.

Without the use of a drain valve, water would drain out from the system at an increasingly low pressure turning the fine water spray into bigger droplets. Drain valves remove any risk of large droplets damaging young seedlings of plants with fine leaves or flowers.

Manufactured from acid resilient materials to allow safe fertiliser application and fertigation processes. The high-quality materials also offer resistance to most dilute acids often used to flush and clean greenhouse irrigation systems between crop placement.