Does A Kitchen Sink Need To Be Vented??

A plumbing fixture like a sink can not function properly without a sink vent.

A sink needs a vent because the pressure put on the drain pipe when water flows down the drain pipe needs to equalize.

The air needs to escape the drain pipe in order for the sink to vent.

How far can a sink be from a vent?

Plumbing Vent System Distances & Routing

If a plumbing fixture is located too far from the main building vent stack, then its own drain pipe must have its own vent stack connection piping. The usual slope on the fixture drain piping is 1/4″ of slope per 12″ (foot) of horizontal distance or “run” of piping.

How do you check a vent pipe for blockage?

Use a flashlight to shine a bright light down the vent pipe to look for further blockage you can reach. If you can see but can’t reach, run a plumber’s snake down the vent pipe. To continue, feed the end of a garden hose down the vent and have someone on the ground turn on the water.

Can I vent my plumbing through the wall?

All the vents connect to it through branch lines, and it vents the main toilet, the most important plumbing fixture in most houses. If you can’t put the main stack through the roof, most local plumbing codes allow you to put it through a wall instead, but there are conditions.