connections ø 3/4"F-3/4"M min flow rate 2 l/min - max 30 l/minwater temperature +2°C/70°Coperating pressure 0.2/10 barTUV - WRAS approvedWater Block is an anti-flooding safety that controls the passage of a nomi volume between 5-50 litres. Its function is to measure the number of litres passing through it. If such amount exceeds the set value, the Water Block blocks the water flow and stops the delivery until user intervention.Electric current is not needed.Not suitable for the USA market.