This study investigates the influence of turbulent parameters on the characteristic centreline of a fluid flow through a T-junction connected to a Vinturi tube through a pipe. Continuity equation, Momentum equation, and Energy equation of water are modelled and solved by using the ANSYS FLUENT 2020R1 Software free Demo. While the turbulent model with standard (k-ε) type is used to compute the turbulent parameters such as turbulent kinetic energy and turbulent dissipation rate for a pipe inner diameter of (D =25 mm) with a length from the T-junction centre line and at the outlet of the Venturi meter is (350 mm). The Reynolds number variation ranged from (1x10 4 to 3x10 4 ) at the step of (5000). The water flowing is considered in an x-direction flow to show the effects of the above parameters. The model is obtained on the velocity distribution, pressure drop distribution, turbulent kinetic energy, and turbulent dissipation rate. The results showed a discrepancy in the values of the effect of the T-junction on the Venturi meter concerning the velocity distribution and pressure drop, while they showed similar behaviour for the turbulence parameters.