Do Floor Drains Require A Vent

Venting allows water to pass out of the drains easily.

Do floor drains require a vent.

Drain pipes take the wastewater to the soil stack. This is the purpose of a venting system. There is another one in the back of the room which is vented. All the faucets and water appliances in a house use this same system of drains pipes and vents.

Toilet vent option 1. As water goes down a drain air is needed to equalize the pressure in the drain line. Vents are a major component in a home s drainage system. Just as drain pipes remove water and waste from your home the plumbing vent pipe also known as a plumbing air vent removes gas and odors it also allows fresh air into the plumbing system to help water flow smoothly through the drain pipes however no water.

If the drain line runs away from the wall where you want the vent use a reducing y and a 45 degree street elbow to point the vent line toward the wall. Today houses are vented through the roof. True vents also have no water running through them. If the outlet of the trap were down at the same level as the sanitary main and the piping was installed such that there was a wet vent or circuit vent then the trap would be vented.

It can be done but takes some creativity. In the photo the trap to the left is for a floor drain. The horizontal vent pipe runs right next to the closet. What is a plumbing vent.

If the toilet drain does not connect directly to a vent you must find another way to vent it. The same holds true for plumbing vent pipe. This is best implemented if a fixture rests close to the stack and the top floor of your home allowing the stack to serve as a vent. The true vent is aligned vertically and attaches to your drain line through the roof.

Roof flashing made from heavy grade rubber lead or sheet metal holds the vent pipe in place. If the drain lines in your home have poor venting as in figure a for example water rushing down the drains will pull water from nearby p traps. The drain can also be tied into a drain line that is wet vented. If the drain is within 5 feet of a wall the pipe can be run towards the wall and a vent run up the wall.