In the previous answer about najasat you said that if the water touches the original najasat(poop around anus), it will be najis and that water splashes and touches anything, then that object will l also be najis. My question is that will that object become najis and stop transferring najaat or it can transfer to other object also?

Another thing I want to ask is that the water comes from a tank more than 374 litres, so This water will make najis thing pure by just one touch or I need to wash 2 or 3 times?

Q1: it can transfer the nijasat.
Q2: after removing ain nijasat washing one time with that water is enough