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 single-phase pressure switch with continuously adjustable switch-on and switch-off pressures. Simultaneously switches 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. Adjust the start pressure (1) 3. Tighten the differential screw (2) to set stop pressure For pumps exceeding 1.1 kW, an external contactor or power relay must be installed upstream. Three-phase 380/400V pumps are not compatible with this device. Product specifications: - Model: SK-9 - Voltage: 230V, 1-phase - Suitable for well pumps, domestic pumps, and pump controls - Reference number: 50622 - WEEE Registration Number: DE45283704 - Quantity per package: 1 - Material: Metal / Plastic - Color: Black - Protection class: IP44 (splash resistant) - Input voltage: 220–240V - Maximum current: 10 A - Connection size: 13 mm (1/4 inch) - Operating temperature range: 0–55°C - Maximum operating pressure: 6 bar - Pressure adjustment range: 1.4–4.1 bar - Start pressure adjustment range: 1.4–2.8 bar - Device type: Pressure switch - Connector: Not included - Control function: Pump control / Pressure switch - Max load: 10 A, single-phase - Weight: 0.376 kg - Package dimensions: 110 mm (H) x 105 mm (L) x 65 mm (W)