Hi henry,
Simple terms :- You are a human, and Humans Die & according to Hindu Dharma any one who dies he or she is given water before anythg happens. As a Symbol of Satisfaction.( not only in Hind Dharma its in all but we ppl have discriminated with unethical social status and ego.)
Now Comg with Examples.
Giving Water Before Death, by near & dear ones or ur blood relations : for them giving or fetching water is DHARMAM.
Giving Water After Death by near & dear ones or ur blood relations : for them giving or fetching water is KARMAM..
I hope now u understood