Toilet Vent In Attic

I have a customer that we are doing some work in the attic for and i noticed yesterday that the plumbing is vented up into the attic phew and not thru the roof.

Toilet vent in attic. Your attic is not a temperature controlled environment is never the same temperature as your living space and generally closer to the temperature outside. I see situations around like this sometimes. The best exhaust fan venting is through smooth rigid ducts with taped joints and screwed to a special vent hood. Studor vents are a very popular kind of air admittance valve that works really well.

When venting a bathroom exhaust fan make sure to vent the air to the outside rather than into your attic where it can cause mold and mildew to form. If you re wondering how studor vents work after the toilet is flushed the water flows down the drain resulting in negative pressure. There are 3 vents in one area and 2 in another. There s even a wet vent included that connects to the bathtub.

Therefore a re vent was added to ensure that sewer gasses could escape. 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. The image below illustrates s typical bathroom with multiple plumbing vents. No you cannot vent your bathroom exhaust fan into the attic.

Toilet vent option 1. The plumbing vent also known as a vent stack helps regulate the air pressure in your plumbing system. This negative pressure causes the vent to open and let in enough air to relieve the pressure. You should never exhaust the bathroom fan directly into the attic.

If the toilet drain does not connect directly to a vent you must find another way to vent it. Bathroom exhaust fans perform an important function by removing excess moisture from your home. The toilet s vent continues up the wall and in many case this vent can tee into the home s existing venting system or the vent can terminate through the roof on its own. 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.

Venting through a roof vent or exhausting them in the attic could cause moisture problems and rot. Vent your bath and kitchen exhaust fans through the roof through a special roof hood. Also notice that the 4 inch toilet flange sits on top of the finished floor.