Drain line into 3" stack

Old 07-24-18, 09:29 AM
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Drain line into 3" stack

Can I drop a 1 1/2" drain line from a under sink mount pump into a 3" exhaust pipe?
Old 07-29-18, 06:57 AM
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Based on the limited information... I think the answer is yes.

Is it a sink-mounted pump? Most I've seen have a 3/4" output.
If it's a pump mounted in a sump box, it can drain into the stack too, but likely requires a proper vent as well.

Does that help? Or can you provide more information?

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