OdorHog Mushroom Cap Slip On Vent Stack Pipe Filter 4" ABS Removes Outdoor Septic Odor

The OdorHog Mushroom Cap is charcoal gray and made from from heavy duty PVC, with three self-tapping metal screws that provide a secure fit on the top of the OdorHog Filter. The Mushroom Cap is all-weather providing excellent venting and is our best value cap. It will stand up to UV rays, hail and snow; shedding deep snowfall off the cap and onto the roof, where it belongs. Like all of our OdorHog filters, the body of the filter is available in White PVC or Black ABS. We recommend the ABS models for northern US and other locations where sub-zero temps are likely. The plastic slip-on models need no tools or glue to install – they slip right on the vent pipe on the roof. If you have metal or cast iron pipes choose a Clamp-on model. A flathead screwdriver or a 5/16" nut driver is all you'll need to install this unit. Each OdorHog has a replaceable mesh bag inside the body, with long lasting, pelletized charcoal, that is activated for the H2S molecule. Changing your charcoal out has never been easier and can be done while the OdorHog remains on the vent pipe! Just remove the cap, pull the old charcoal bag out by the handle and put the new bag in and put the cap back on. Fresh charcoal in minutes! Our Commercial grade charcoal is made from a coconut shell based carbon that has a higher sewer gas absorption capacity and is made for longer life. It is perfect for heavy odor applications. OdorHog filters are designed for passive or ambient air flow and are not suitable for applications where blowers or fans push/force air through the filter.