Spare part suitable for most domestic water installations at 230V. Includes a mechanical pressure switch designed for use with domestic water systems, expansion tanks, and garden water pumps. AC pressure switch with continuously adjustable switch-on and switch-off pressure settings. Single-phase pressure switch that simultaneously controls phase and neutral. Automatically activates the pump based on water pressure levels. When system pressure drops below the set cut-in point, the pump starts and stops once the desired pressure is restored.Pressure switch adjustment instructions: 1. Loosen the differential nut (2) 2. Set the start pressure (1) 3. Tighten the differential screw (2) to adjust stop pressure For pumps exceeding 1.1 kW, an external contactor or power relay is required. Not suitable for 380/400V three-phase pumps. Product: Pressure switch SK-9 230V 1-phase Reference: 50622 WEEE Registration Number: DE45283704 Number of packages: 1 Material: Metal / Plastic Color: Black Protection class: IP44 (splash proof) Input voltage: 220-240V Rated current: 10(10)A Connections: 13 mm (1/4 inch) Operating temperature range: 0 - 55C Maximum operating pressure: 6 bar Pressure adjustment range: 1.4 to 4.1 bar Start pressure adjustment range: 1.4 to 2.8 bar Pump control / Pressure switch Maximum load: 10 A, single-phase Weight: 0.376 kg Package dimensions: 110 mm (H) x 105 mm (L) x 65 mm (W) Connector: Not included