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 pressures. Single-phase pressure switch that simultaneously controls phase and neutral. Automatically activates the pump based on water pressure levels. Pump starts when system pressure drops below the set cut-in point 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 standard power relay must be installed upstream. Not suitable for 380/400V three-phase pumps. Product specifications: - Model: SK-9 - Voltage: 230V, 1-phase - Suitable for domestic pumps, well pumps, and water system control - 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: None included - Function: 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)