Abstract: An averaging pitot tube for measuring fluid flow in a pipe or conduit, is disclosed, including an integral head connected by a transition to a sensing tube or probe. The probe is insertable through the conduit or pipe in which fluid flow occurs to measure an upstream high pressure and a downstream low pressure. Upstream holes are formed in the probe to communicate high pressure into a high pressure chamber in the probe. Downstream holes are also formed in the probe to communicate a low pressure into a low pressure chamber in the probe. Valves placed in the integral head selectively open and close the high and low pressure passageways that communicate with the high and low pressure chambers. A measurement device is selectively connectable to the integral head and is in fluid communication with said high and low pressure passageways to make measurements of flow dependent upon the difference between the high and low pressure. Tube fittings placed in the head are disclosed for reducing leaks in the system.