GARDENA Pressure Switch - Pressure Switch - Low Water Safety - Thread G 1" - 1739-20, Pressure Switch with Low Water Safety used to convert a surface irrigation pump into a pump station. It has three functions. Advantages : Ideal for transforming a surface irrigation pump into a pumping station 3 functions: Pressure switch for automatic start/stop - Low water safety device - Automatic adjustment of stop pressure Factory-set starting pressure (approx. 2.0 bar) Features : Connecting thread: 33.3 mm (G 1") (26/34) Dimensions L x W x H: 9 x 16 x 26 cm Protection class: IPX4 Reference: 1739-20 Packaging : GARDENA Switch - Pressure gauge - Low water safety - Thread G 1" - 1739-20