If you look at the chemical reaction of baking soda and vinegar, I believe that the resulting solution is just simply salty water. While the bubbling effect looks fun and makes you believe it is giving the cleaning power a boost, it is in fact less effective than either of the two ingredients would be if used on their own.
Re: pipes - be they copper (less and less of that these days), or plastic-based (with copper connections), your sink drains are made to handle hot water. But if pouring hot vinegar, make sure you do not inhale the vapors.
If you look at the chemical reaction of baking soda and vinegar, I believe that the resulting solution is just simply salty water. While the bubbling effect looks fun and makes you believe it is giving the cleaning power a boost, it is in fact less effective than either of the two ingredients would be if used on their own.
Re: pipes - be they copper (less and less of that these days), or plastic-based (with copper connections), your sink drains are made to handle hot water. But if pouring hot vinegar, make sure you do not inhale the vapors.