I had left strong drain cleaner in our kitchen drains overnight (instead of limiting the solvent to 5 minutes). Unfortunately, the strong sulfuric acid in the drain cleaner dissolved the glue holding the drain pipes together, flooding water the next day into the cabinet area under the sink! What a cleanup task!! Drain Rescue's plumber had to rebuild the drainpipe combination (from 2 sinks and a sinkerator). The job was completed properly and in a timely manner. I've forgotten the plumber's name (it's an age thing!), but he had very helpful suggestions. I would definitely use Drain Rescue again!