Definitions by Rod Pennington

Stink pipe 

Located on every roof top in every town, village, and city, is " the stink pipe. One of the largest contributors of toxic greenhouse gases and noxious sewer odors on the face of the earth. It is the source of that "awful smell" that gets into your house through air conditioners, vent fans, chimneys, open windows, etc.

Vent pipe filters are the solution to stink pipe odors,ie: Sweetfilter(tm)

Stink pipes pipes allow gas to escape from sewer mains and household plumbing so that water can flow down the drains.

Stink pipe by Rod Pennington November 26, 2006

Zeocarbon 

Zeocarbon is a proprietary mixture of activated carbon and a volcanic rock called zeolite that has superior odor absorbing characteristics than activated carbon alone.

Zeocarbon removed the rotten egg smell and the ammonia smell from my plumbing vent pipe.

Zeocarbon by Rod Pennington December 21, 2005

sweetfilter 

zeo-carbon canister designed to remove odors from sewer gases

The sweetfilter made my backyard barbeque a success.

sweetfilter by Rod Pennington October 26, 2003