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 live and neutral lines. Automatically activates the pump based on water pressure levels. When system pressure drops below the set start point, the pump turns on and shuts off 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 the 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: Pressure switch SK-9 Voltage: 230V, 1-phase Application: Domestic pump, well pump control 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 Plug: Without connector Suitable for pump control / pressure control Maximum load: 10 A, single-phase Weight: 0.376 kg Package dimensions: 110 mm (H) x 105 mm (L) x 65 mm (W) Availability: Ships immediately, delivery within 3-5 business days Shipping: Package