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 controls both live and neutral lines. Automatically activates the pump based on water pressure levels. When system pressure drops below the set 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. Three-phase 380/400V pumps are not compatible with this single-phase switch.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: 1 piece - Material: Metal / Plastic - Color: Black - Protection class: IP44 (splash proof) - Input voltage: 220240V - Maximum current: 10 A - Connection size: 13 mm (1/4 inch) - Operating temperature range: 055C - Maximum operating pressure: 6 bar - Pressure adjustment range: 1.44.1 bar - Start pressure adjustment range: 1.42.8 bar - Plug type: Without connector - Weight: 0.376 kg - Package dimensions: 110 mm (H) x 105 mm (L) x 65 mm (W) Availability: Ships immediately, delivery within 35 business days. Shipping: Package