Yes, the air vent (air gap) is very much required!! It prevents water from traveling from the sink drain pipe or garbage disposal and into the dishwasher.
Partially clogged drain line.
Make sure the drain hose has a loop tall as the dishwasher under the sink. This will stop the water from going back in the dishwasher.
It is called an air-gap not a vent. If you are asking about Washington State the answer is yes it is required.
Your kitchen sink should already be vented if there is a p-trap draining to the wall. if it is an s-trap it is not vented and not to present code requirements. The dishwasher drain goes into the side of the disposal and the disposal should drain to the trap. A separate vent is not required for the disposal or dishwasher as the trap for the sink is what requires a vent.
on the brand new kenmore elite dishwasher, what is the vent on the upper side left of door and where is the main venting - top bottom side, where
It is usually hooked up to your kitchen sink p-trap or garburator under the sink, which is vented. This is the only vent you need for drainage.
Yes, as long as it isn't a dry VENT stack
I have seen this where water has leaked into the ductwork and stagnated.
I BELIEVE: In a horizontal run, the p-trap must be below the vent. Otherwise, the vent may fill with water, creating a blockage, which would then syphon the water from the p-trap causing odors and health concerns from sewer gas. On a horizontal run, the vent must come off the run (presumably with a "wye") where the vent run is above the center line of the drainage run, thus the p-trap is lower than the vent...
This is generally a local code thing. We do not require it in our area and a loop is acceptable. Check with your code guy!
A geyser is a natural vent that discharges steam or water from Earth.