Thread: AC drain idea
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Old 12-30-2015, 01:59 PM   #47
psneeld
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You need an anti-siphon loop if the discharge is underwater (permanently or for long temporary periods such as a sailboat on a long tack) and the open source is below the waterline....such as a centrifugal bilge pump in a shower sump.

Has more to do with siphoning than cross contamination.

In this case the opening to the sink is the anti-siphon opening. Would only be an issue maybe if you had it stoppered and full of water so it was airtight.
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