Most of my recipes are for people, this one is for a different set of pipes. I have found it works better than commercial drain openers. I received this recipe about ten years ago in a newsletter with one of my utility bills. I don't know who the author is to give a much deserved credit to.
1 cup Baking Soda
1 cup Vinegar
1 cup Table Salt
2 quarts Boiling Water
Combine the first three ingredients and pour into drain. Then pour in the boiling water.