iLAN gas minder interlock system kit complies with commercial kitchens' mandatory requirements (BS 6173:2001). The purpose of the iLAN gas interlock system is to ensure there is no gas flow to burners unless air extraction is present. iLAN Gas Interlock system pack Including 1x GM-4 Control Unit. 1x Differential Pressure Switch. 1x Stop Button 1x Duct Kit (Tubing for pressure switch) and 1x Gas Solenoid Valve 1" (28MM). Effortless installation with a comprehensive instruction guide, making it the easiest interlock system to set up without any hassle. Comes with a 24-Months Warranty.