Help How to stop the Fluid flow?

[josemendez]

Stop the flow of existing Fluid
It's like the water in the pipe is frozen and can't flow

If you mean turning the liquid into a rigidbody, can't be done. Closest thing you could do is disabling density constraints, and setting all particle inverse masses to zero. That would stop flow, but the resulting fluid would just be frozen in space. Would not react to any external forces. Is this what you're after?