I have never seen one that connects to the waste collection container. My ASM has 2 air lines 1 from each pump and they just come up to a holder connected to the collection cup. Be careful not to restrict the air flow as these skimmers require a lot of air flow. I believe i have many of the new BK and H&S where the air tube connects to a plastic container the size of a pill box and i assume that this may act as an air filter and muffler without restricting the air flow.
Tom R
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