It’s actually a really good practice to do this monthly, just to keep your drains running clear. I have a nasty-smelling one in our basement wet bar where food debris builds up in the trap and starts reeking. Every couple of weeks I flush the trap using this method to keep the sink at bay. (Telling my family to stop rinsing dishes in the wet bar sink hasn’t worked, unfortunately.)

Tonight a have a perfectly clean kitchen drain. 

I wonder if this would work to keep other household drains clean, or is it just meant for kitchen debris..hmm.