In some applications, the problem isn't with sewage gas leaking out of the venting system into living areas - It's with sewage gas entering living areas after leaving the outdoor vent pipe.

Here's an example: The outlet for a roof-mounted sewer vent pipe is located less than 10 feet away from a patio frequently occupied by guests. Prevailing winds and the shape of the building occasionally funnel sewage odors down into the patio area.

In this case, even though the venting system is working as designed, it's not consistently moving the odors to an area where they won't be objectionable.

One solution to this problem is odor dilution - i.e., diluting the odors with fresh air before they can reach living areas.

Typically, this is accomplished by installing an odor dilution air injector below a sewer vent fan, so that the fan not only draws odors out of the vent system, but also mixes it with much larger amounts of fresh air in the injector:

Results:

1. Much lower concentration of sewer gas in the air exiting the vent system, and
2. Much higher air velocity as it leaves the vent system, when tends to keep it from sinking down into living areas.

Note that the air injector must be installed in an outdoor area - This ensures that there is no chance of it venting sewage gas into living spaces if the vent fan ever stops working. Typically, it's installed immediately below the vent fan, although it could be located at just about any other point on the suction side of the fan that has fresh outdoor air available.

Our Air Injector includes one 4" rubber drain coupler, which is typically used to mate it with a vent fan (sold separately). The two rubber drain couplers supplied with the vent fan are then used to install the fan/injector combination to your vent pipe.

Since it's installed outdoors, it's typically used with the Weatherproof Outdoor version of our vent fan. Here's a typical example of an Air Injector/Vent Fan combo, using the 2" rubber reducing couplers ordered with that particular fan:

Note that the Air Injector is ALWAYS mounted on the air INLET (bottom) side of the vent fan.

PRICES & ORDERING:

CLICK HERE to order an Odor Dilution Air Injector and a Super Stanker Weatherproof Outdoor Fan with 1.5" rubber drain couplers for $284.25*.

CLICK HERE to order an Odor Dilution Air Injector and a Super Stanker Weatherproof Outdoor Fan with 2" rubber drain couplers for $284.25*.

CLICK HERE to order an Odor Dilution Air Injector and a Super Stanker Weatherproof Outdoor Fan with 3" rubber drain couplers for $284.25*.

CLICK HERE to order an Odor Dilution Air Injector and a Super Stanker Weatherproof Outdoor Fan with 4" rubber drain couplers for $284.25*.

CLICK HERE to order an Odor Dilution Air Injector by itself for $47.25* (includes one 4" rubber drain coupler).

*Plus $13.60 USPS Priority Mail shipping to any US destination.

Last Updated 2/7/2020