111109 air admittance valves
-
Upload
sdouglass11 -
Category
Business
-
view
1.068 -
download
0
description
Transcript of 111109 air admittance valves
Sharing our Guidance
Air Admittance Valves
AIR ADMITTANCE VALVES
AGENDA
What is an Air Admittance Valve (AAV)?AAV HistoryAAV BenefitsUnderstanding AAVsCode ApprovalsSpec Sheet Example
04/07/23 2
X
AIR ADMITTANCE VALVES
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. A discharge of wastewater causes the AAV to open, releasing the vacuum and allowing air to enter the plumbing vent pipe for proper escape of sewer gas and maintaining the trap seal.AAVs are typically made from polyvinyl chloride (PVC) plastic materials with ethylene propylene diene monomer (EPDM) rubber valve diaphragms. Valves come in two sizes: one for fixture venting and a larger size for system venting. The valves fit standard diameter pipes ranging from 1-1/4 to 4 inches.
What is an Air Admittance Valve (AAV)?
04/07/23 3
X
AIR ADMITTANCE VALVES
Sture Ericson developed the air admittance valve in Sweden in the early 1970s. He introduced the valve to the United States in 1986 and was instrumental in the development of the ASSE Performance Standards 1050 and 1051, as well as gaining code approvals in state and model codes.In 1988, Studor, Inc. was established as the distributor for North America. Studor, Inc. was acquired by IPS Corporation in 1998.
AAV History
04/07/23 4
X
AIR ADMITTANCE VALVES
Reduces roof penetrationReduces vent pipe roof flashings that eventually leakReduces unsightly vent pipesPrevents vermin and pests from entering the building through open vent pipesReduces pollution of the environment by sewer gas, and prevents sewer gases from being drawn into air conditioning units and air handlers and polluting habitable spacesProvides architects and engineers freedom of layout and designReduces the number of fire stopping devicesSolves problem to vent island sinks, wet bars and other fixtures in difficult locations
AAV Benefits
04/07/23 5
X
AIR ADMITTANCE VALVES
Air admittance valves must be installed in accordance with the requirements of the IPC where this code is in effect and with the installation standards of the specific manufacturer. The requirements of the major manufacturers are very similar to the requirements of the IPC. Following are general requirements for installing an air admittance valve:
1. Individual or branch-type air admittance valves may be used for venting individual fixtures, branch fixtures, and circuited fixtures. By this requirement, air admittance valves are not permitted for venting combination drain and vent systems and wet-vented systems. Air admittance valves are not permitted to vent these systems because of the possibility of positive pressure in combination drain and vent systems and wet-vented systems.
Understanding AAVs
04/07/23 6
X
AIR ADMITTANCE VALVES
2. Stack vents and vent stacks shall be permitted to terminate to stack-type air admittance valves.
3. Individual and branch-type air admittance valves shall only vent fixtures that are on the same floor level. These fixtures shall connect to a horizontal branch drain.
4. Air admittance valves shall only vent stacks and systems that are a maximum of four branch intervals from the top of the stack.
5. Drainage systems and stacks that are four branch intervals from the top of the stack shall be provided with a relief vent. This relief vent shall extend to the venting system that extends to the outdoors.
6. Stack-type air admittance valves shall not serve as the vent terminal for drainage systems that exceed six branch intervals.
7. Individual and branch-type air admittance valves shall be located a minimum of 4 inches above the fixture drain.
Understanding AAVs
04/07/23 7
X
AIR ADMITTANCE VALVES
8. Stack-type air admittance valves shall be located at least 6 inches above the flood level rim of the highest fixture drain.
9. The valve shall be located within a ventilated space.10. A minimum of one vent shall extend to the outdoors.
Understanding AAVs
04/07/23 8
X
AIR ADMITTANCE VALVES
Code Approvals
04/07/23 9
State IPC IRC UPC NSPCApproval
StatusAlabama X X Approved
Alaska X Not Approved
Arizona X X Approved
Arkansas X Approved
California X Partial Approval
Colorado X X Approved
Connecticut X Approved
Delaware X X Approved
District of Columbia X X Approved
Florida X Approved
Georgia X X Approved
Hawaii X Approved
Idaho X X Approved
Illinois Not Approved
Indiana X X Approved
Iowa X Not Approved
Kansas X X Partial Approval
Kentucky Not Approved
Louisiana Not Approved
X
AIR ADMITTANCE VALVES
Code Approvals
04/07/23 10
State IPC IRC UPC NSPC Approval Status
Maine X X Not Approved
Maryland XApproved Appendix E 2005 edition
Massachusetts Not Approved
Michigan X X Approved
Minnesota Not Approved
Mississippi X X Approved
Missouri X Partial Approval
Montana X Not Approved
Nebraska X X Not Approved
Nevada X Partial Approval
New Hampshire X Approved
New Jersey XApproved Appendix E 2005 edition
New Mexico X Partial Approval
New York X X Approved except NYC
North Carolina X X Approved
North Dakota X Not Approved
Ohio X Approved
Oklahoma X Approved
X
AIR ADMITTANCE VALVES
Code Approvals
04/07/23 11
State IPC IRC UPC NSPC Approval Status
Oregon X Approved
Pennsylvania X X Approved except Philadelphia
Rhode Island X X Approved
South Carolina X X Approved
South Dakota X Partial Approval
Tennessee X Approved except Shelby County
Texas X X X Approved (limited Houston approval)
Utah X X Approved
Vermont X Approved
Virginia X X Approved
Washington X Partial Approval
West Virginia X X Approved
Wisconsin X Approved
Wyoming X X Not Approved
Approval status as of December 31, 2010
IPC=Internatinal Plumbing Code
IRC=International Residential Code
UPC=Uniform Plumbing Code
NSPC=National Standard Plumbing Code
Note: Plumbing Codes are subject to change, please verify with your local code officials before installing AAVs
X
AIR ADMITTANCE VALVES
Spec Sheet Example
04/07/23 12
AIR ADMITTANCE VALVESQUESTIONS? DISCUSSION?
THANK YOU.