07:37AM | 02/25/06
Member Since: 01/24/06
1449 lifetime posts
An air admittance fitting supposedly lets air in the system NOT OUT.

They depend on a piece of crap rubber for integrity.

If an insect or some debris gets into the junk there goes your safety

Certain vapors may destroy the flapper from working.

Remember "sewer gases" contain any of the following

Sewer gas is a complex mixture of toxic and non-toxic gases that can be present at varying levels depending upon the source. It is formed during the decay of house hold and industrial waste. Highly toxic components of sewer gas include hydrogen sulfide and ammonia

Hydrogen sulfide poisoning. Exposure to low levels of hydrogen sulfide causes irritation of the eyes and respiratory tract. Other symptoms include nervousness, dizziness, nausea, headache, and drowsiness. This gas smells like rotten eggs, even at extremely low concentrations. Exposure to high concentrations can interfere with the sense of smell, making this warning signal unreliable. At extremely high levels, hydrogen sulfide can cause immediate loss of consciousness and death.

Explosion and fire. Methane and hydrogen sulfide are flammable and highly explosive.

Remember some codes do allow these devices and many code officials are bought and paid for by local politicians who sold thee common decency for a political contribution IMHO

AAV's were primarily approved to keep costs down not a word about safety was mentioned.

Even the powers who did allow garbage to be placed into their Mickey mouse codes did have some sense to put some restrictions to cover their butts.

I personally would try the following.

Have one 4" VTR to prevent hoarfrost and possible either install a return bend (180 deg fitting) or a vandal proof cap on top to prevent leaves and animals from blocking the VT.

Then connect the other vents to this main vent stack or if need be install 2- 4" VTR

The VT if not located near an arch or window or over hang and is used for weather protection can be as low as 24" ( CHECK LOCAL CODE). DO NOT use plastic that may come into contact with direct sun light.

To have a safe plumbing system you need air circulation Unless your just planning on fixing this home and selling it and run off to the hills and forget about the folks living in this structure with a very inferior design .

Not all plumbing should be geared upon bottom line practices.

Heath issues should not take a back seat.

The hospitals are full of good intension DIY folks

Have fun


12:01PM | 02/25/06
Member Since: 01/24/06
1449 lifetime posts
Ted drive them one way Kennedy says "guns kill" YET he along with his kin folks killed 4 women so far that we know of and none of my assault fire arms killed anyone.

I Still would rather target shoot with the VP then get in a car and allow Ted Kennedy take me for a drive.

I would love to see Hellery Clinton go target shooting with the VP


09:44AM | 10/11/13
Like most, those not familiar or understanding atmospheric pressure or venting systems immediately think that all products made and installed are Studor vents. There are several vendor on the market that make poor quality and tested components that of course give this vendor a bad name.

We have designed and installed these systems for several years in major chain hotels, civic cents, office buildings, clinics, schools, churches, universities, GSA, DoD, etc. Most of the failures we experience in our projects nationwide are usually a result on improperly installed devices or contractors mounting vents during construction phase in lieu of installation at fixture placement.

When all else fails ready the installation directions, place and size in proper location, assure single exterior vent to outside per system manual and do NOT use cheaper products.


06:51PM | 10/12/13
Member Since: 01/24/06
1449 lifetime posts
AAV's are garbage in my professional opinion and to risk someone health on a piece of plastic and a rubber flapper is not really what people want in a civilized country

The reason some places do approve of things like this is simple.

We have the best politicians money can buy ..

There are to many things that can cause these devices to fail such as a bug getting caught under the rubber disc etc


Post a reply as Anonymous

Photo must be in JPG, GIF or PNG format and less than 5MB.


type the code from the image


Post_new_button or Login_button

Painting your front door a striking color is risky, but it will really grab attention. Picking the right shade (and finish... Built on a rocky island in the Drina River, near the town of Bajina Basta, Serbia, this wooden house was cobbled together ... Large steel-framed windows flood the interior of this remodeled Michigan barn with daylight. The owners hired Northworks A... Edging formed with upside-down wine bottles is a refreshing change. Cleverly and artistically involving recycled materials... A Washington State couple called on BC&J Architects to transform their 400-square-foot boathouse into a hub for family bea... Similar to the elevated utensil concept, hanging your pots and pans from a ceiling-mounted rack keeps them nearby and easy... For windows, doors, and mirrors that could use a little definition, the Naples Etched Glass Border adds a decorative flora... The thyme growing between these stepping stones adds a heady fragrance to strolls along this lush, low-maintenance garden ... Decoupage is an easy way to add any paper design to your switch plate, whether it is wallpaper, scrapbook paper, book page... Twine lanterns add pops of crafty—but sophisticated—flair to any outdoor setting. Wrap glue-soaked twine around a balloon ... When securely fastened to a tree or the ceiling of a porch, a pallet and some cushioning make the ideal place to lounge. V... Reluctant to throw away any of those unidentified keys in your junk drawer? Hang them from a few chains attached to a simp... A stripped-down model, sans screened porch, starts out at $79,000. Add the porch, a heated floor for the bath, and all the... Salvaged boards in varying widths and colors make up the dramatic accent wall in this attic space. The high-gloss white of... This garden shed has been decked out to the nines. Designer Orla Kiely created the intimate home for a flower trade show, ...
Newsletter_icon Google_plus Facebook Twitter Pinterest Youtube Rss_icon