
	Where results make sense

Topic: Air Admittance Valves

Related Topics

Plumbing drainage venting

Plumbing

Building construction

Concentration

Plumbing

In the News (Thu 31 Dec 09)

Northern Trust

Marvin Harrison

Peter Chernin

Gary Locke

Match Play

Penelope Cruz

Mickey Rourke

AR Rahman

Danny Boyle

Hugh Jackman

	DRAFT
		The purpose of an air admittance valve is to provide a method of allowing air to enter the plumbing drainage system without the use of a vent extended to open air and to prevent sewer gases from escaping into a building.
		The air admittance valve shall be rated for the size of the vent to which the valve is connected.
		The air admittance valve shall only vent fixtures that are on the same floor level and connect to a horizontal branch drain with a maximum of four branch intervals.
	www.healthyarkansas.com /phc/plumbingairadmittanceregs.htm (1367 words)

	STUDOR (R) inVENTive Technology (TM) - Air Admittance Valves (via CobWeb/3.1 planetlab2.tamu.edu) (Site not responding. Last check: 2007-10-29)
		The purpose of an air admittance valve are (1) to provide a method of allowing air to enter the plumbing drainage system without the need for a vent extended outdoors to open air, and (2) to prevent sewer gases from escaping into the building.
		Air admittance valves shall be the same size as the vent pipe to which they are connected.
		Air admittance valves shall not be installed until all required leak tests of the drainage and vent piping are successfully completed.
	www.studor.com.cob-web.org:8888 /codes.htm (2143 words)

	Plumbing Systems A B Home Inspections
		The difference between an air admittance valve and a mechanical vent is that no spring is needed to close the valve; it seats by gravity (figures 8 and 9).
		Air admittance valves on a vent stack must be at least 6 inches above the flood level rim of the highest fixtures.
		Their evaluation report says "When properly used, an air admittance valve system is equivalent to an open piped vent system." The UPC still does not directly recognize air admittance valves, though the use of "Alternate Methods and Materials" is allowed under section 301.2.1.
	www.abhomeinspections.com /PlumbingSystems.html (1562 words)

	STUDOR (R) inVENTive Technology (TM) - Air Admittance Valves
		The air admittance valve shall be rated in accordance with the standard for the size of the vent to which the valve is connected.
		Air admittance valves shall be installed in accordance with the manufacturer's instructions and Section E.8.
		Stack type air admittance valves shall be installed at least 6 inches above the flood level rim of the highest fixture served by the valve.
	www.studor.com /codes.htm (2140 words)

	City of Salina, Kansas - Section 906 - Vent Termination (Site not responding. Last check: 2007-10-29)
		Air admittance valves shall be installed after the DWV testing required by Section 712.2 or 712.3 has been performed.
		The air admittance valve shall be located the minimum of six inches above the highest flood level rim of the fixture being served.
		The valve shall be located within a ventilated space that allows air to enter the valve.
	www.ci.salina.ks.us /DevServices/UPC906.htm (220 words)

	Air Admittance Valves (via CobWeb/3.1 planetlab2.tamu.edu) (Site not responding. Last check: 2007-10-29)
		Air admittance valves (AAVs) are pressure-activated, one-way mechanical vents, used in a plumbing system to eliminate the need for conventional pipe venting and roof penetrations.
		Because air admittance valves eliminate the need for vent stack penetrations and flashing at wall assemblies, attics, and roof decks, they mitigate the potential for air and water leakage due to vent stack penetrations.
		AAVs are accepted by major model building and plumbing codes, including IRC 2003, for single or multi family residential construction, and by American Society of Sanitation Engineers (ASSE).
	www.toolbase.org.cob-web.org:8888 /Technology-Inventory/Plumbing/air-admittance-valves (1154 words)

	Brett Martin - Building - Soil & Waste - Design
		Air admittance valves are designed to decrease the number of external roof and wall surface penetrations required to accomodate soil and ventilating stacks without reducing the effectiveness or performance of the system.
		Air admittance valves are packaged in formed polystyrene boxes, the tops of which should be fitted to the valve top after installation, providing insulation for the valve in use.
		Air admittance valves can be fitted to sanitary pipe work systems of buildings up to ten storeys high.
	www.brettmartin.co.uk /building/soilwaste/technical_guide/design/airadmittancevalve.aspx (369 words)

	One way air admittance valve - Patent 5048562
		The valve of the present invention may be used on a soil pipe for a water closet, or a waste pipe for a sink or a bath.
		The valve may operate to let in a substantial amount of air and this is advantageous in that the valve may be used on pipes in high storey buildings.
		More specifically, air at the inlet ports 6 is prevented by the seal 20 from passing to the centre of the sealing means 8, and air at the inlet ports 6 is prevented by the seal 18 from passing to the periphery of the sealing means 8.
	www.freepatentsonline.com /5048562.html (2600 words)

	FloPlast (Site not responding. Last check: 2007-10-29)
		Air Admittance Valves must be installed at a position above the highest flood level of the highest appliance e.g.
		Air Admittance Valves when used externally are outside the specification of the BBA Certificate.
		The 32mm, 40mm and 50mm Air Admittance Valves are made from white ABS and will accept Waste Pipe conforming to BS 5254 and BS 5255, connected by a multifit type compression joint.
	www.floplast.co.uk /soilwaste/air.stm (290 words)

	NSF Tests Air Admittance Valves
		Air admittance valves are designed to allow air movement in one direction: from the building into the DWV (drain, waste, and vent) piping system.
		AAVs are not intended to prevent back pressure or air pressure in the DWV system from exceeding the atmospheric pressure.
		Air admittance valves are usually tested to one of two American Society of Sanitary Engineering Standards: ASSE 1050-Air Admittance Valves for Plumbing DWV Systems, Stack Type Devices, and ASSE 1051-Air Admittance Valves for Plumbing Drainage Systems, Fixture and Branch Devices.
	www.nsf.org /business/newsroom/plumbing98-1/air.html (399 words)

	How To Install Air Admittance Valves UK : Diy Hints, Tips & Advice : Diy Doctor
		The equalisation of pressure prevents the foul air from escaping and the water seals in the traps (bath, toilet and basin) from escaping.
		Air admittance valves, when installed, must finish above the highest flood level of the space the valve is in...I.E. If the valve is in the same room as a wash hand basin, it must be higher than the overflow of that basin.
		The use of air admittance valves are governed by building regulations and cannot be used in all cases.
	www.diydoctor.org.uk /projects/air_admittance_valves.htm (354 words)

	Air Admittance Valves (via CobWeb/3.1 planetlab2.tamu.edu) (Site not responding. Last check: 2007-10-29)
		AAV is certain to save both time and money on the installation when compared with open vent piping systems.
		The Micro and Macro AAV conform to ANSI/ASSE 1050.
		The Micro size Magic Vent AAV has a 1 1/2 inch female threaded connection, however the valve is rated for 1 1/4 inch to 2 inch individual or branch vent pipes.
	www.rectorseal.com.cob-web.org:8888 /aav.htm (350 words)

	STUDOR (R) inVENTive Technology (TM) - Air Admittance Valves (via CobWeb/3.1 planetlab2.tamu.edu) (Site not responding. Last check: 2007-10-29)
		A. The Studor Air Admittance Valve (AAV) is a one-way valve that allows air to enter the plumbing drainage system when fixtures discharge.
		The valve closes by gravity when discharge is completed and under no flow conditions preventing sewer gas from escaping into the valve.
		If air does not enter the system and balance the pressure the water in the fixture trap will be siphoned allowing sewer gas to enter the building.
	www.studor.com.cob-web.org:8888 /faq.htm (1761 words)

	Plumbing drainage venting - Wikipedia, the free encyclopedia (via CobWeb/3.1 planetlab2.tamu.edu) (Site not responding. Last check: 2007-10-29)
		On the other hand, if the air pressure within the drain becomes suddenly higher than ambient, this positive transient could cause waste water to be pushed into the fixture, breaking the trap seal, with dire hygiene and health consequences if too forceful.
		An air admittance valve (AAV, sometimes known as "cheater vent") allows air to enter the plumbing drainage system through a one-way air valve when a plumbing fixture is operated.
		AAVs allow greater freedom of design for engineers and architects; the classical application is for an island sink in a kitchen where running a vent upward is not possible.
	en.wikipedia.org.cob-web.org:8888 /wiki/Plumbing_drainage_venting (1081 words)

	STUDOR Air Admittance Valves(AAVs)
		AAVs comply with American and European Standards -, they have been tested to 1.5 million cycles, the equivalent of 80 years of average service without failure.
		valves have a warranty period equal to that of the plumbing system in which they are installed.
		Positive pressure is generated in two forms within the drainage system: a) constant pressure - which is the slow build-up of pressure due to a long-term blockage within the system; and b) positive transients - which are produced at every discharge of the system, mainly at the base of the stack.
	www.studor.net /technical/faq_AUNZ.asp (654 words)

	OATEY: Sure-Vent® Air Admittance Valves
		Air Admittance Valves (AAVs) open and close in conjunction with normal DWV system operation, effectively eliminating the need for secondary vent pipes.
		AAVs provide the ideal venting solution for island sinks, remote bathroom groups and remodeling jobs by eliminating the need to tie into a stack vent.
		AAVs are often more economical than running vent pipe in new construction because they reduce the added need for supplies and labor.
	www.oatey.com /aav_public/why_vent.html (376 words)

	Schnectady, NY - Schenectady Habitat for Humanity
		Air admittance valves are plumbing vents that allow air intake into the drain-waste-vent system, but prevent gases from escaping.
		Studor air admittance valves were used for this project, but other brands are available.
		The forced air system installed in this house was a conventional ducted system with the d uctwork located within conditioned space.
	www.pathnet.org /sp.asp?id=1344 (1166 words)

	Controlling Pollutants \| IAQ Design Tools for Schools \| Indoor Air \| U.S. EPA
		Air out is when completed products that produce objectionable emissions are removed from packaging and unrolled or spaced apart in a well-ventilated warehouse so that fresh air can easily flow in and around the products, thereby quickly removing any pollutants emitted from the products.
		Flush out is when large amounts of outdoor air are forced through a recently completed building for a period of 3 to 90 days so that the majority of pollutant emissions from building materials, finishes, and furnishings can be removed from the building before occupancy.
		Air that is contaminated with mold, radon, moisture, and pesticides can easily enter the rooms, and pests such as roaches or rodents can enter the rooms, leaving behind odors, allergens, and potentially, disease-causing pathogens.
	www.epa.gov /iaq/schooldesign/controlling.html (5744 words)

	Auto vents and automatic home sewer vents from FAMOUS PLUMBING SUPPLY
		We have the air admittance valves, vents and auto vent that you need.
		When a plumbing fixture is operated and water drains out of the system, negative pressure causes the valve to open, allowing air to enter as needed to equalize the pressure and protect trap seals from siphonage.
		When the flow stops, gravity closes the valve, preventing the escape of sewer gases through the valve.
	www.plumbingsupply.com /autovent.html (715 words)

	Proper use of an air admittance valve? - NACHI Message Board
		It seems like the plumber is instead of using a normal vent is using an AAV for the floor drain like you said.
		The air admittance valve shall be installed a minimum of 6 inches (152 mm) above insulation materials where installed in attics.
		valve is only suppose to be used as a last resort, with the inspectors permission.
	www.nachi.org /forum/showthread.php?t=4185 (463 words)

	Magic Vent(TM) Air Admittance Valve (Site not responding. Last check: 2007-10-29)
		The Micro size air admittance valve has a 1 1/2 inch female threaded connection, however, the valve is rated for 1 1/4 inch through 2 inch individual or branch vent pipes.
		The Macro size air admittance valve is rated for either a 2 inch, 3 inch or 4 inch vent pipe for either stack vents or individual and branch vents.
		Magic Vent™ air admittance valves are permitted for use in accordance with International Plumbing Code 2000, Section 917, International Residential Code 2000, Manufactured Housing Construction and Safety Standard 1998 and all current versions of SBCCI, Standard Plumbing Code and BOCA, National Plumbing Code.
	www.rectorseal.com /presrel/releases/magicvent.htm (381 words)

	Air Admittance Valve (via CobWeb/3.1 planetlab2.tamu.edu) (Site not responding. Last check: 2007-10-29)
		The Air Admittance Valve is a fire-rated air vent that saves money for plumbing contractors and owners in two ways.
		The air vent valves take the place of the normal vent piping required to vent a plumbing drainage system.
		The ProSet Air Admittance Valve can optionally be supplied with a special Flame Tech 25 flame and 50 smoke-rated resin for installation within return air plenums and more importantly can be used in high-rise construction where no-combustible pipe is required.
	www.prosetsystems.com.cob-web.org:8888 /aavalve1.htm (438 words)

	Reece - Air admittance valves for sanitary systems
		STUDOR’s Premi-Aire range of Air Admittance Valves (AAVs), available from Reece, offers an alternative to the expensive and complex open vent piping systems that penetrate the roofs of most homes, factories and office blocks.
		The STUDOR Premi-Aire AAVs allow air to enter the plumbing drainage system through a one-way air valve when water flows through the pipes.
		The STUDOR Premi-Aire 50 is a top of the range valve developed for group venting and capable of venting up to 60 fixture units (5.9L/sec).
	www.ferret.com.au /articles/51/0c01b151.asp (370 words)

	vacuum_valves_cat2
		Ball Valves made from brass or stainless steel, are the simplest vacuum valves.
		Air Admittance Valves are compact valves to allow entry of air to a vacuum system.
		Gas Inlet Valves are small, hand operated valves to allow a controlled flow of gas into a vacuum system.
	www.finemech.com /vacuum_valves_cat2.shtml (244 words)

	Ayrlett Air Valve Company LLC
		The greatest benefit to using AAV’s is the savings generated in both time and money.
		Ayrlett’s AAV’s have been tested by an independent U.S. laboratory 500,000 times in temperatures ranging from -40 to 150 degrees Fahrenheit.
		Air Admittance Valves are accepted for use in most areas.
	www.ayrlett.com /benefits.html (112 words)

	Air Admittance Valve testing, Mechanical Analysis, failure analyses (Site not responding. Last check: 2007-10-29)
		This allows air to flow into the system preventing a temporary vacuum from pulling the water out of the traps, permitting sewer gas from later entering the building.
		Where it is not possible to provide a through-the-roof vent, it is becoming more common to use an Air Admittance Valve, which allows air to flow into the soil lines, protecting the trap seals by breaking the vacuum.
		These include numerous tests that rate both the performance of the valve under simulated conditions of use, and objective tests of the performance under laboratory conditions.
	www.acrtlabs.com /air_admittance_valve_testing.html (173 words)

	Studor Air Admittance Valves (AAV) in Drainage Systems
		The Studor Air Admittance Valve is a plastic device designed with a sealing member, or diaphragm, that opens to admit air by lifting upward when a negative pressure occurs as the water falls in the drainage system.
		The Studor Valve has screens to prevent the admittance of vermin such as roaches or mice that can interfere with the operation of the diaphragm.
		The valve has an insulation cap of foamed plastic to prevent freezing and frost closure when used in a cold environment.
	www.cif.org /nominations/nom_208.html (278 words)

	Air Admittance Valves (Site not responding. Last check: 2007-10-29)
		AAV's perform that function without the need for additional piping to the outdoors.
		These standards are the nationally recognized consensus standard regulating air admittance valves.
		AAV screws directly onto the tee connection of the Magic Trap
	www.rectorseal.com /aav.htm (350 words)

	Air Admittance Valve (AAV) - DoItYourself.com Community Forums
		It is a diaphragm device that allows air to enter into the plumbing DWV system but not allow sewer gases to escape.
		The air gap is full of sewer gas from further down the line and it travels up, opposite the water thru the depleted trap and into your nose.
		AAV’s look good on paper but after 15 years or so their seals break down, springs break, and they stop sealing properly.
	forum.doityourself.com /showthread.php?p=1057118#post1057118 (876 words)

Try your search on: Qwika (all wikis)