Fitted a twin Gas-It System all working filled up tanks twice all good. Also fitted an external Barbecue point all fittings from Gas-It. Only recently tried the Barbecue and found it does not work no gas coming through. Fitted the tee piece from main pipe with a gate valve to the barbecue outlet and all pipes checked for stoppage all clear. After a chat with the Gas-It technical man, turned on all gas rings and oven then opened the valve to the barbecue point at this point gas flames went out on cooker. Lit gas again and pushed the purge button on the Truma Valve again gas went out on the cooker. As soon as I open the barbecue port all I get is a rush of gas for a second then nothing. I even bought another external barbecue fitting from Gas-It just in case that was a faulty one but no luck either. Gas-It are quite happy to refund me for the second fitting. Has anyone got any ideas what to do now?