It consists of a tank provided with inlet supply diffuser, overflow. Provision for fitting Orifice or Mouthpiece at the outlet of tank. An arrangement is done to vary head and keep it constant at desired level. A pointer gauge arrangement for measuring X-Y co-ordinates of Jet is also fitted.Present set-up is self-contained water re-circulating unit, provided with a sump tank and a centrifugal pump etc. Flow rate of water is measured with the help of measuring tank and stop watch.