I have heard this term used in reference to a composting style toilet system, if that is your question then yes you can have a cap that allows venting, (that type of system exhausts fumes)
If you have a more standard system (sewer or septic types) then you must assure that the vent pipe can "breath," if you must cap the pipe do to unpleasant smells then there is a capping device called "studor cap/vent." This type of vent will allow air to flow in one direction. They are easily installed by a DIY person, and are a cheap solution to this type of problem, although they are difficult to find, sometimes.
AAV's thankfully are not approved in civilized placesI can picture a lot of hoar frost occurring because of the restrictions that these plastic crap devices causeRodents can and do get into almost any pipe.
No
Cut pipe threads on the end so that you can screw a fitting on the pipe. Same as the lid on a jar.
By looking for the vapor in colder areas
Every building has a vent terminal in modern societies
put it on ya stink pipe
Every building has a "stink pipe." Usually located on the roof these pipes vent air to allow the plumbing drains inside the building to work correctly. As water flows into a plumbing drain pipe, air is vented out of the drain through the "stink pipe." The pipe that goes from the bottom of the back of your toilet, up the side of your house to let any gases produced by the waste escape into the air instead of bubbling back up through your toilet and sticking up your house.
plug, tap, gate, pipe, lid
plug, tap, gate, pipe, lid
Yes a clogged VENT pipe can cause a sluggish drain
yes
Toys are not really supposed to stink. I don't know if you understand your own question. Possibly you intended to ask how to get the stink off a toy elephant, in which case I would suggest washing it.