After pouring drain cleaner down the kitchen drain, we started hearing a blup, blup, blup, sound coming from the drain after running water emptys from the drain. He has used a rooter from below up to the drain, but it still does the blup, blup, blup sound. The drain is clear. What now? Does he need to go from the roof down or is something else causing the blup, blup, blup sound?

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After pouring drain cleaner down the kitchen drain, we started hearing a blup, blup, blup, sound coming from the drain after running water emptys from the drain.

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you have a blocked vent. Sound you hear is the system attempting to vent itself through the kitchen trap. Forget using harsh chemicals in your system they never seem to work except in TV commercials. The solution is to snake from the kitchen roof vent. Put out enough snake to reach the base and 15 put more. Good luck, Tom

Speedball 1. Thank you for your answer. That is exactly what he did and it solved the problem, No more blup, blup, blup sound.

Nice to get some feedback. Glad I could help and that you got all fixed up. Good luck, Tom