Seagas A26 Gas Control Tap with Flame Supervision Device + Piezo Safe, Reliable & Easy Ignition The Seagas A26 Gas Control Tap with Flame Supervision Device (FSD) and Piezo Igniter is a versatile and CE certified gas control valve tap for use with gas fires, convector heaters, decorative fuel effect fires, and a wide range of domestic and commercial gas appliances. Designed for safety, reliability and ease of use, it has precise gas flow control and rotary piezo ignition for single handed operation. The built in flame supervision device will shut off the gas supply if the flame is extinguished, protecting the user and property. This complete kit comes with control knob, fascia nut, nuts and olive for easy installation.