I am hoping someone can help ... our kitchen sink stopped draining, it looks like an airlock somewhere. This is what I tried:
1) Used chemical drain unblocked and plunger 2) Took everything apart and checked all pipes 3) Bought endoscope and inspected all pipes all the way to 110 soil pipe - all clean 4) Replaced bottle trap (McAlpine C10V Anti-Vac). Also tried McAlpine S Trap 5) When the sink is full and not draining, I can push the AAV up with my finger, then the valve starts sucking air in and the sink starts draining. This is why I suspect the issue is with the airlock somewhere
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