Question 1

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

Accepted Answer

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.

Question 2

How often do you need to change the filter?

Accepted Answer

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.

Question 3

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

Accepted Answer

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.

Question 4

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

Accepted Answer

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

ASIN	B004BUX1AG
Best Sellers Rank	#78,018 in Home & Kitchen ( See Top 100 in Home & Kitchen ) #414 in Air Purifier Filters
Brand Name	OdorHog
Compatible Devices	HVAC System (PVC/ABS Vent Pipes)
Customer Reviews	4.6 4.6 out of 5 stars (1,079)
Filter Mounting Type	Slip On
Filter Shape	Round
Item Dimensions L x W x Thickness	5.5"L x 4"W x 13.25"Th
Item Weight	0.86 Kilograms
Manufacturer	OdorHog
Manufacturer Part Number	OHOG-MUSHCAP-30
Material Type	ABS Plastic
Model Number	Ohog3.0 Abs
Number of Items	1
Product Grade	new
UPC	683333215893
Unit Count	1 Count

Vent Stack Pipe Filter 4 Sizes, Black ABS with Mushroom Cap, Removes Outdoor Septic and Sewer Odors (3.0-inch)

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