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#Air admittance valve for toilet vent code
Welcome to the new and improved Building Code Forum. In this video, I talk about a cheater vent that is sometimes used in plumbing systems A cheater vent is often referred to as an air admittance valve, and is. How does it work Air admittance valves work with a sealing mechanism that is lifted to let air into the drain system when there is negative pressure and allow proper drainage. Air Admittance Valves (AAV) open and close in conjunction with normal DWV system operation, effectively eliminating the need for secondary vent pipes. Air admittance valves (AAVs) are mechanical plumbing devices that can take the place of plumbing vents. After a toilet flushes the increased water flowing down the drain creates a negative pressure. Studor vents allow air to enter the pipes while keeping sewer gasses or odor from escaping. (Note that test reviews have been edited for length and clarity. Studor, a brand name air admittance valve, can solve venting problems when open air venting pipes will not work. It is not unusual that you should be seeing air admittance valves on plumbing vents in Oklahoma since Oklahoma has adopted the International Plumbing Code and the plumbing provisions of the International Residential Code statewide.īoth the IPC and IRC plumbing provisions allow air admittance valves on all vents except for pneumatic sewage ejectors, except on the required one 3" vent that penetrates the roof as a main vent, and where local codes restrict or forbid AAV use.ĪAVs are also allowed in Maine jurisdictions and elsewhere that have adopted the IPC and IRC plumbing provisions. Venting plumbing with an air admittance valve The Building Code Forum. Shop Oatey Sure-Vent 160 DFU on branch, 24 DFU on stack 1-1/2-in Plastic Mechanical Plumbing Air Admittance Vent in the Under Sink Plumbing department at . While we’ve written before about the best air admittance valves, a virtually indestructible AAV, and the best plumbing vent alternative, here we’ve rounded up the best-reviewed air admittance valves testings.