How to install a Studor vent for a kitchen sink?
Installing an Air Admittance Valve: Everything You Should Know
- Measure Your Clearances. Measure the length of the horizontal pipe (the waste arm) between the P-trap and the wall using a tape measure.
- Mark the Pipe and Cut It. Using a felt-tip pen, make a mark on the horizontal waste arm at a distance at least 5 inches from the trap ...
- Glue In a Straight Tee. ...
- Install the Valve. ...
- Reinstall the Pipe. ...
How to use a soffit vent?
The two most common options are to:
- Install low gable vents located above the top level of the attic ceiling insulation
- Use “eye-brow” vents that are on the top of the sloping roof surface near the soffit/eave area.
- Focus on the other ventilation you have in the attic.
What states allow air admittance valves?
- A solution to difficult venting problems. They are especially useful for island sinks, for which a loop vent is the alternative.
- Savings in labor and materials. Instead of running pipes through the walls, a plumber simply has to glue a single, inexpensive fitting to the P-trap waste arm.
- Longevity and easy replacement. ...
- Reduction in roof penetrations. ...
What is the purpose of a vent stack?
Understanding Plumbing Vent Systems
- A Milestone in Plumbing. Without venting, P-traps would lose their water and be useless. ...
- The Venting Network. ...
- Special Venting Situations. ...
- Circuit Vents. ...
- The Chicago Loop. ...
- Air Admittance Valves (AAVs) AAVs are mechanical devices that can take the place of a conventional vent connection on a sink drain.
- Symptoms of Vent Blockages. ...
When should a studor vent be installed?
4:265:36Studor Air Admittance Valves Revolutionizing the Plumbing IndustryYouTubeStart of suggested clipEnd of suggested clipThe many hours of installing vent piping is reduced to a simple time-saving installation of an A.MoreThe many hours of installing vent piping is reduced to a simple time-saving installation of an A. The most popular location for a stewed or AAV is under a sink or in a vanity.
How long do studor vents last?
Studor offers a 10-year warranty and claims a 500,000 cycle lifetime. Another concern with an air admittance valve is that it might leak if there is a sewage backup.
How many fixtures can you have on a studor vent?
A single vent serves as the vent for three to eight fixtures. The Studor Mini-Vent or Tec-Vent serves as the circuit vent. When the horizontal drainage branch connects to a stack having more than four branch intervals located above the branch, a relief vent is required.
Do studor vents smell?
We had a strong sewage smell develop in our powder room that I traced to under the vanity. I replaced the air admittance valve installed there with a new studor mini vent and the smell went away immediately. Surprisingly fast in fact.
Is a studor vent necessary?
The Studor vent lets that air to be sucked in the pipe during water flow but doesn't let sewer gas escape out. Code is the thing that determines pipe size and also water flow. Hence no studor vents are permitted to toilets because more air is required to keep water flow going with more waste added to the toilet.
Can a studor vent fail?
They are however overused so if you can put a traditional vent in it is best to do because the studor vent does not last forever and they do go bad and need replacement from time to time.
Can you vent a toilet with a studor vent?
Studor vents allow air to enter the pipes while keeping sewer gasses or odor from escaping. After a toilet flushes the increased water flowing down the drain creates a negative pressure. The negative pressure opens a valve in the Studor allowing air to enter the drain pipe.
Do you need to vent a kitchen sink?
Without venting, the negative pressure caused by the flow of draining water can potentially suck water out of the drain trap and allow sewer gases to enter the home. The vents allow air into the drain pipes to help keep the drain flowing properly.
How much does it cost to install a studor vent?
Costs vary with project size, job quality and time of year. For typical Plumbing Vent Installation expect to pay between $79.88 to $239.63 for each vent line. Additional fees are typically charged for small projects or rush jobs. Is a permit needed for Plumbing Vent Installation work?
Where do you put a studor vent?
0:021:40How to Install an Oatey Sure Vent Air Admittance Valve - YouTubeYouTubeStart of suggested clipEnd of suggested clipThe AAV must be installed vertically. And cannot be more than 15 degrees out of level also determineMoreThe AAV must be installed vertically. And cannot be more than 15 degrees out of level also determine the DFU load of the fixture or fixtures.
Why does my house smell like sewer gas?
If you are detecting foul sewer odors inside the house, this means that there is a weak link somewhere in your plumbing system. Possible sources include bathroom sink drains, toilets, kitchen drains, basement drains, old cast iron piping, or even the vent stack that goes out through your roof.
How long does an air admittance valve last?
AAV's are certified to reliably. However anything mechanical can and will fail. Some manufacturers claim they're good for 500,000 uses (approximately 30 years of use).
What is the purpose of an air admittance valve?
The purpose of an air admittance valve is to provide a method of allowing air to enter the plumbing system without the use of a vent extended to open air and to prevent sewer gases from escaping inside a building.
What is an AAV valve?
Definition of Air Admittance Valve (AAV): An AAV is a one-way valve that allows air to enter the drain to satisfy the vacuum caused by water passing down the drainage system, but that prevents sewer gases from backing up through the vent into the building .
Can air admittance valves be added to a building?
Air Admittance Valves can be added to it's own. Watch out section for risk of dangerous sewer gases re-entering the building respectfully. Oatey's Sure-Vent, Oatey, Studor's Mini-Vent, Studor's Maxi-Vent can all be a risk of possible dangerous sewer gases re-entering the building.
Can a branch vent terminate with a branch type air admittance valve?
Individual, branch and circuit vents shall be permitted to terminate with a connection to an individual or branch-type air admittance valve. Stack vents and vent stacks shall be permitted to terminate to stack-type air admittance valves.
What is a studor vent?
Studor is a brand name. Studor vent is an Air admittance valve. Basically a one way valve for air. Sewer lines always have a vent line that eventually goes through the roof at some point to allow air in/out the sewer line.
Where does the vent pipe go on a 2nd floor?
On the 2nd floor a second sink drain is connected to that “vent” pipe coming up from the first floor sink. The pipe then continues upward and through the roof providing the needed vent for both sinks.
What is an air admittance valve?
More commonly known as an air admittance valve or AAV, they are a “point of use" vent installed above the weir of a trap that lets air into the system while allowing the trap to drain. They’re normally closed until “pull” from drainage becomes active enough.
Why is it illegal to dumping water in a vent?
When there’s no water the ball drops and opens up the vent. In a lot of states there illegal because when no water is available gases can enter the house. But this is a cheap plumbers trick.
What is an AAV valve?
Studor air admittance valve’s (AAVs) are used as a method for venting traps for fixtures and waste receptors.
Do electric stoves need vents?
Continue Reading. You don’t, generally speaking. An electric stove, for example, doesn’t need ventilation. It is nice to have a range hood, because it will take strong smells, water vapor, grease and heat out of the air, thus improving the experience, though.
Can a fixture be vented in the wall?
It's basically just a spring check. So in theory, a fixture can be vented in the wall using one of those but only in theory.
What is a mechanical vent?
Mechanical vents are a core component of every plumbing system, especially when it comes to proper waste disposal. Just like any mechanical component, they are prone to breakdown, and when it happens, the odor in your house is unbearable it’s not a pretty sight. It’s a common problem in many households, especially when it comes to figuring out how ...
What happens when you vent a sewer under the sink?
For many of us, when there is a plumbing problem such as sewer vent under the kitchen sink, it creates an uncomfortable environment. We usually see it as an uphill battle, but in that real sense, it’s a simple procedure.
What is the function of a U-trap?
In our sinks, water draining through these pipes always create a vacuum that siphons air in U-trap leaving it dry, that primary function of U-trap (also referred to as J-trap or P-trap) is that creation of an air-tight water seal that closes preventing sewer gases from escaping back up again onto this sink drain.
Can you install AAV as a secondary venthole?
In some areas, some of the local council codes allow the installation of AAV as secondary ventholes. If this is the case, you should be able to continue with your installation as the sink has a venthole that’s not fully functional.
Can studor mini vents fail?
Despite thorough testing and experimentation studor mini vent can fail at times, these valves are usually gravity operated and are adversely affected by this decrease in pressure allowing air in. It’s a common air admittance valve problem that clogs your kitchen or bathroom sink and stops sucking out air as it should.

The Pros
The Cons
- Some state and local building departments prohibit Studer vents. check with the local AHJ (Authority Having Jurisdiction) for more information. Studer vents are certified to reliably. However, anything mechanical can and will fail. Few manufacturers claim they are better for 500,000 uses (about 30 years of use). The United States manufacturers provide warranties that …
When Is It Important to Use A Studor Vent?
- Studor is a brand name. Basically, a one-way valve for air. Sewer lines have a vent line that eventually goes via the roof at some point to let air in or out the sewer line. As you drain a large slug of water via the sewer line if the air isn’t allowed to enter and exit freely it’ll do that glug-glug thing you see when you turn a bottle of water down and let it get drained. If you slowly tilt and le…
Inspecting The Studor AAV
- STUDOR AAVs must be situated a minimum of 4-inches above the horizontal branch drain and fixture drain being vented.
- STUDOR AAVs shall be accessible. For in-wall installation, utilize STUDOR recess box and grill combination.
- STUDOR AAVs location must let for enough air to enter the valve. When located in wall spac…
- STUDOR AAVs must be situated a minimum of 4-inches above the horizontal branch drain and fixture drain being vented.
- STUDOR AAVs shall be accessible. For in-wall installation, utilize STUDOR recess box and grill combination.
- STUDOR AAVs location must let for enough air to enter the valve. When located in wall space and attic space lacking ventilation openings, the opening shall be provided. Locating the valve in a sink...
- STUDOR vents should be installed in the vertical, and upright position. A maximum deviation of 15 degrees is allowed.