An island sink presents a unique plumbing problem: Like all drains, the sink drain has to be vented to allow air ... kitchen. Plumbers have two solutions. One allows them to run a vent pipe under ...

My new kitchen ... vent pipes is to allow air into your plumbing system. When your plumbing drain system is not in use, all the pipes are filled with air except for the water that’s in the traps ...

One example of the latter is under-the-sink plumbing ... bugs, and cold air an easy way into your kitchen. Here’s how Deziel—a building contractor and fix-it pro—suggests dealing with ...