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 live and neutral lines. Automatically activates the pump based on water pressure levels. When system pressure drops below the set threshold, the pump starts and stops once 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 is required. Three-phase 380/400V pumps are not compatible with this single-phase switch.Product specifications: - Model: SK-9 - Voltage: 230V, 1-phase - Suitable for: Domestic pumps, well pumps, water system control - Reference number: 50622 - WEEE Registration Number: DE45283704 - Quantity: 1 piece - 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 - Application: Pump control / Pressure switch - Max Load: 10 A, Single-phase - Weight: 0.376 kg - Package Dimensions: 105 mm (L) x 65 mm (W) x 110 mm (H) Availability: Ships immediately, delivery within 3–5 business days. Shipping: Package