Rain harvesting and only pump when you need to, restricted flow to 2.0 l/min, prevent dry tank syndrome, maintains a minimum water level in rainwater tanks, delivers consistent 2.0 l/min, suitable for high/low pressures (0.2 Bar – 12 Bar), max pressure at 20°C = 12 Bar / 174 PSI, soft open and close action, preventing valve bounce and water hammer, strong, compact design, manufactured from strong, non-corrosive, UV stabilised materials.