Abstract: The space necessary for the installation of gas feed valves for domestic applications and the like of the type wherein gas feed valves take gas from a main gas feed duct and deliver it to gas using units is minimized by arranging the valves within the main gas feed duct, and by providing valves which include a valve body having at least one gas admission orifice opening directly within the gas space of the duct and a gas discharge, section opening outside of the duct. The valve body is fixedly arranged within the gas space of the duct by a suitable clamping arrangement, the valve body having a valve member concentrically arranged within the same for closing and opening the admission orifice and the discharge section.