Where is one to discard the water?
It suffices to spill the water down the sink or toilet.<a href="#_ftn1" name="_ftnref1">[1]</a> However one must take great heed not to spill the water over food vessels.<a href="#_ftn2" name="_ftnref2">[2]</a> If one did so he is to wash the vessels very well afterwards.
<a href="#_ftnref1" name="_ftn1">[1]</a> Beir Moshe 8:39; Salmas Chaim 17
<a href="#_ftnref2" name="_ftn2">[2]</a> Ashel Avraham Butchach 4

Shulchan Aruch HaRav | ❓Where is one to discard the Neigal Vaaser water?

Where is one to discard the water? It suffices to spill the water down the sink or toilet.[1] However one must take great heed not to spill the water over food vessels.[2] If one did so he is to wash the vessels very well afterwards. [1] Beir Moshe 8:39; Salmas