Kitchen Sink Not Vented

[Admin]

Our kitchen sink is not vented, do sinks have to be vented or can you have a non-vented sink without issue?

 

[desertwater]

How do you know it isn't vented? Yes it needs to be vented, wether its a legit vent going through the roof or its a studor vent under the cabinet, that drain needs to breath.

 

[johnjh2o]

All fixtures need to be vented. With out a vent the traps can siphon allowing sewer gas to enter the home.

John