Vent Under Bathroom Sink Plumbing Diagram Pics. Under sink vent not working. Here's how to connect the plumbing under your bathroom sink.
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But if that flexible stainless pipe is servicing the sprayer up above in a kitchen sink, i'd be concerned about it, through usage, slowly. The vent and drain work together to keep water flowing. Home forums > plumbing forum, professional & diy advice >. If you hear gurgling sounds coming from your drains, see standing water in your sink or bathtub, or notice a slow drain in the bathroom or kitchen, a blocked vent may be the issue.