how long will it stay effective? Do filters need to be changed?

Yes, there is a replaceable charcoal filter inside the body, in a breathable fiberglass mesh bag. When the charcoal becomes fully saturated with Hydrogen Sulphide in several years (depending on the level of sewer gas emitting from your vent stack), you can remove the mushroom cap, pull the bag out by the handle and slide the new bag in while the unit remains on the vent. Many of our repeat customers purchase their replacement bag at about the 3 year mark.

How often do you need to change the filter?

Even though concentrations of sewer gas vary depending on whether a commercial building or a smaller home, we see customers buy their replacement charcoal at about the 3 year timeframe. Using a lot of bleach or having multiple bathrooms off one vent can also wear the unit prematurely.

how long does it last untill you have to change the filter? How often do you have to change the filter?

Hi Roxanne,Many of our residential customers come back to our website to order their replacement bags at the 3 year mark. Those that have a very active home and vent system, with many kids, showering, lots of laundry, clorox use, etc, can expect to get 18 months to 2 years out of their charcoal life. The important thing to note is that replacement bags are available on our website for $22.49 ea and they can be changed out while the filter remains on the vent stack. Pull the old bag out and massage the new bag down in, put the cap back on and your all done! Thanks, Karen at OdorHog Inc.

can this be used as air admittance valve? (replace candy cane?)

Hello David, OdorHog Vent Pipe Filters are different from a AAVs. The OdorHog has a densely packed carbon filter bed that the vent pipe breaths through. Some customers have used OdorHogs in conjunction with an AAV if their vent pipe has too much negative pressure. OdorHogs can be installed on the vent pipe once the candy cane is removed because they are installed upright so the carbon stays fully seated in the filter. A candy cane was designed to keep out debris or rain and once removed, the OdorHog takes the place of that rain cap. If that doesn't fully answer your question, please feel free to contact us directly at info@odorhog.com. Best regards, Dave

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🚫💨 Say goodbye to outdoor odors with OdorHog – your vent’s new best friend!

PROUDLY MADE IN THE USA - Quality craftsmanship ensures reliable performance and peace of mind.
LONG LASTING ODOR DEFENSE - Activated charcoal filter neutralizes septic and sewer odors for years, not months.
ECO SMART COST EFFECTIVE - Replaceable mesh bags reduce waste and save money compared to disposable filters.
BUILT TO BRAVE THE ELEMENTS - Rugged ABS plastic and mushroom cap design shield against sun, rain, leaves, and debris.
EFFORTLESS FIT FOR EVERY ROOF - Choose from 4 precise sizes for a seamless slip-on installation on standard PVC/ABS pipes.

OdorHog Vent Stack Pipe Filter is a durable, easy-to-install activated charcoal filter designed to eliminate unpleasant outdoor septic and sewer odors from roof vent pipes. Available in 4 sizes for standard PVC/ABS pipes, it features a weather-resistant ABS plastic mushroom cap that blocks water and debris. The eco-friendly, long-lasting activated carbon filter bags provide superior odor control, making OdorHog a smart, sustainable choice for maintaining fresh outdoor air around your home.

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Brand Name	OdorHog
Model Info	OHOG-40-MUSHCAP
Item Weight	2.92 pounds
Product Dimensions	12.9 x 5.5 x 5.5 inches
Item model number	OHOG-40-MUSHCAP
Is Discontinued By Manufacturer	No
Installation Type	Vent Pipe
Part Number	OHOG-MUSHCAP40
Material Type	Plastic
Batteries Included?	No
Batteries Required?	No

Vent Stack Pipe Filter 4 Sizes, Black ABS with Mushroom Cap, Removes Outdoor Septic and Sewer Odors (4.0-inch)

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