Sent in my Judy. B
Your product works after failure by mechanical effort. Hours of snaking with two different snakes; draining and refilling the whole system from the sink to the main sewer with hot water, baking soda, vinegar, all kinds of soap to cut grease or whatever was causing the problem; then a shop-vac from all openings using it to suck out the water as as to pressure to lines to dislodge anything; then cutting into pipes to allow for different areas to access with snake and the like, all for naught.
After all effort that in desperation i poured in a bottle of main line cleaner and waited a few hours….and voila, a well working drain….
Thank you for a great drain cleaner! regards, Judy B.