Abstract: A combined service valve and outage indicator for a liquified gas tank, consisting of a valve body engagable in the neck of a liqufied gas container. The valve body has a main screw valve element engagable in a seat in the body to control the flow of gas from the container to a service outlet. The valve element has an operating knob with an indicating pointer overlying a volume scale disc secured on the valve body. Secured to the inlet end of the valve body is a depending cylindrical chamber closed at its bottom end and having spirally arranged holes. A tubular sleeve is rotatably and sealingly engaged in the cylindrical chamber and has a vertical slot or recess registrable progressively with the holes. The top end of the tubular sleeve communicates with a cavity in the chamber leading to a vent passage in the valve body controlled by a screw valve.