K.M.
I have been cleaning and unplugging with vinegar for 30 years. I use white vinegar as it is the least odorous and expensive. For a toilet I use 1/2 gallon, and add baking soda slowly as it foams rather quickly. Depending on the clog, I may use up to 2 cups of soda. For a floor drain, can you shut the valve so the vinegar solution stays in the pipes a while? If not, add vinegar and soda alternately, and keep a plunger handy. Good luck. Kate