Setting Fluid Initial Stage

Hi,
I’m working on fluid flowing from a container to another and the simulation has been satisfactory so far. But i need to change the initial stage of the fluid so that i have exactly the part which i want and where i want to start simulation but blender right now seem to not allow me run the pouring simulation only after it has settled in the first container. Basically i want pouring part of the simulation only. can anyone help me, please!
Thanks.