07:37AM | 02/25/06
Member Since: 01/24/06
1626 lifetime posts
Me office1
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
1626 lifetime posts
Me office1
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
1626 lifetime posts
Me office1
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


03:54PM | 09/13/14
Studor vents are utilized when a drain line/ Vent is not connected to toilets. Methane comes up the sewer line on all drain lines but vents to outside air,to keep any pressure building in pipe. Like pouring gas out of a gas tank it needs air to replace liquid while pouring. The Studor vent allows that air to be sucked in the pipe during water flow but also does not allow sewer gas to escape out. Code is what determines pipe size and water flow. Hence no large studor vents are allowed to toilets because more air is needed to keep water flow going with additional "waste" "added" in toilet. Use Studor to replace sink only air vents. Like I stated size is the restriction because of pipe size by code. Some sinks are connencted on the same air vent pipe as toilet.


06:49PM | 09/14/14
Member Since: 01/24/06
1626 lifetime posts
Me office1
To depend on a peace of plastic to prevent carcinogenic and flammable fumes from entering a structure takes a certain mindset

If you have 6 roof penetrations most decent plumbers can pipe them into one or two roof terminals and increase the vent pipe going through the roof to 4" to prevent hoarfrost

In most civilized areas would frown upon having someone die because a little plastic part failed to operate
4 cast iron


03:58PM | 02/17/16
Just how many deaths a year do sewer gasses cause?


04:20PM | 02/21/16
Tieger plumbing

Hard to tell "how many deaths per year" as the sewer gases are cancer causing and it can take years to find out
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