The 4-chamber diaphragm pump, lets the water flow particularly gently and quietly through a smooth running motor and a soft mechanical bypass control. Each pump head is equipped with a non-return valve for over 13 bar. The pump remains quiet without rattling both when starting up and closing the tap. 2.1 bar, 24V, max. 3.5A. The pump is self-priming up to 3.1m and has a hose connection of 10mm.