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Studor 20391 Redi-Vent Air Admittance Valve with Tubular Tee Adapter, 1-1/2-Inch Connection

4.3 4.3 out of 5 stars 227 ratings
$28.94
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Purchase options and add-ons

Material Acrylonitrile Butadiene Styrene
Brand Studor
Item dimensions L x W x H 3.5 x 3.5 x 6 inches
Exterior Finish Abs,Polypropylene
Inlet Connection Size 0.5 Inches
Inlet Connection Type Barb
Valve Type admittance valve,valve

About this item

  • Compact air admittance valve with polypropylene tubular adapter
  • Ideal for a single fixture or group of fixtures up to 20 DFUs (drain fixture units) on a branch and 24 DFUs on a stack
  • Creates ventilation that prevents the loss of water seals in traps; uses gravity to automatically close seal and prevent circulation of unpleasant bathroom or drain odors
  • Fits 1-1/2-inch piping; temperature rating of -40°F to 150°F (-40°C to 65.6°C); complies to ANSI/ASSE 1050 and 1051; this style air admittance valve is not recognized as a mechanical vent in the International Building Code
  • Exclusive vermin protection system keeps out bugs and foreign objects
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Product details

  • Is Discontinued By Manufacturer ‏ : ‎ No
  • Product Dimensions ‏ : ‎ 3.5 x 3.5 x 6 inches; 5.5 ounces
  • Item model number ‏ : ‎ 20391
  • Date First Available ‏ : ‎ October 3, 2013
  • Manufacturer ‏ : ‎ IPS Corporation
  • ASIN ‏ : ‎ B00FQEX7FK
  • Country of Origin ‏ : ‎ China
  • Customer Reviews:
    4.3 4.3 out of 5 stars 227 ratings

Product Description

Product Description

Simplify drainage and waste venting with the Studor Redi-Vent Air Admittance Valve. The unique design of the Studor Redi-Vent provides ventilation to prevent the loss of water seals in traps without the need for expensive roof penetration and vent piping. Fits: 1-1/2- to 2.625-inch vent height x 2-inch vent diameter. ABS construction with a temperature rating of -40 to 150 deg F. Dimensions: 6.8125-inch width x 5.78125-inch height.

From the Manufacturer

This Studor tee-pipe connection is designed specificlly for use with Redi-Vent air admittance valve systems.

From the brand

Previous page
  2. studor ips corporation

    The Studor AAV can be used in lieu of expensive and complex plumbing (open pipe) vent systems that penetrate roofs of buildings. The purpose of vents is to allow air to enter the plumbing drainage waste and vent system and equalize pressure when water drains out of the system maintaining the integrity of the water trap that prevents sewer gases from entering the building through fixture drains.

  3. studor mini vent

    Studor Mini-Vent

    With a compact design, this Air Admittance Valve offers a simple drain and waste venting solution.

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From the manufacturer

Studor
Studor Redi-Vent Air Admittance Valve with Tubular Tee Adapter

Studor Redi-Vent Air Admittance Valve with Tubular Tee Adapter

A Simple Drain and Waste Venting Solution

Great for venting a single fixture or a group of bathroom fixtures, the Redi-Vent with tubular tee adapter is designed to fit 1-1/2-inch pipes and excels in tight applications.

The Redi-Vent one-way valve automatically opens and takes in fresh air when negative pressure (suction) occurs from a fixture discharging into the plumbing system. When the water flow stops, the Redi-Vent closes naturally due to gravity, preventing the circulation of any bad bathroom or drain odors.

  • Fits 1-1/2-inch piping
  • Temperature rating of -40° F to 150° F (-40° C to 65.6° C)
  • Creates ventilation that prevents the loss of water seals in traps
Ideal for a Single Fixture or Group of Fixtures

Ideal for a Single Fixture or Group of Fixtures

With a capacity of up to 20 DFUs (drain fixture units) on a branch and 24 DFUs on a stack, this economical negative pressure valve creates essential ventilation that prevents the loss of water seals in traps, eliminating the need to install expensive and unsightly roof penetrations and vent piping.

Designed for residential and commercial use, the Studor Redi-Vent Air Admittance Valve (AAV) can be used in conjunction with other Studor AAVs to complement larger high-rise building drainage systems. The active air valve is designed with an exclusive vermin protection system to keep out insects and foreign objects.

What's in the box

  • Redi-Vent Air Admittance Valve with Tubular Tee Adapter

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    Customer reviews

    4.3 out of 5 stars
    4.3 out of 5
    227 global ratings

    Customers say

    Customers like the performance, ease of installation, and draining of the valve. For example, they mention it works well, it's easy to install, and it takes care of poor drainage. That said, opinions are mixed on the quality.

    AI-generated from the text of customer reviews

    19 customers mention15 positive4 negative

    Customers like the performance of the valve. They mention that it works well, and that it corrects venting issues on bathroom sinks.

    "...videos of this baby in action and testing it for myself, IT WORKS WONDERFULLY! The velocity of the waterflow increased substantially!..." Read more

    "...This item works great." Read more

    "It is working great" Read more

    "...Well that did not work as expected. Original was made in the USA, replacement in China. The replacement made the problem worse." Read more

    18 customers mention18 positive0 negative

    Customers find the installation of the valve to be easy in most kitchen sink applications. They also appreciate the plastic "T" shape and the convenience of the molded plastic.

    "High quality and easy to install" Read more

    "...Was easy to install but then I'm around construction a lot. Comes just like the picture so you DONT have to buy an extra Redi Vent...." Read more

    "Easy to install- all slip joints. Measure to make sure it’ll fit vertically- mine was 1/4” from the sink after installation...." Read more

    "It is very easy to install, it works the way as described. It has solved my slow drain problem." Read more

    10 customers mention10 positive0 negative

    Customers are satisfied with the draining of the valve. They mention that it works flawlessly, takes care of poor drainage, and keeps the water flowing down the drain. Some say that the device is a great way to keep the water flow up.

    "...The velocity of the waterflow increased substantially!..." Read more

    "This air gap device is a great way to keep the water flowing down the drain." Read more

    "...I used this and it has been working flawlessly, I have not issues with the water draining any slower than a normal sink and seems to be venting..." Read more

    "...These fit in line perfectly and the sinks drain normal (fast) now. Was easy to install but then I'm around construction a lot...." Read more

    7 customers mention7 positive0 negative

    Customers appreciate the value of the valve. They say it's a good deal, very cheap, and works perfectly to correct venting issues.

    "...For this price, both pieces are a bargain, I'm so happy with it and HIGHLY RECOMMEND for everyone experiencing delays with draining, especially..." Read more

    "Great idea great price" Read more

    "Very easy to install and works as described. Well worth the money." Read more

    "Pros: Easy installation. Fit as expected. Good value for the money. Rapid shipment.Cons: None" Read more

    5 customers mention5 positive0 negative

    Customers are satisfied with the fit of the valve. They mention that it fits perfectly if you have enough horizontal space to work with in, and that it's a perfect fit for under the kitchen sink using only the included adapters.

    "This fits perfectly if you have enough horizontal space to work with in your trap arm...." Read more

    "This is the T and the AAV for 1.5" or 1.25" drains. It fit my 1.5" drain perfectly using only the included adapters...." Read more

    "I had two very very slow draining vessel sinks. These fit in line perfectly and the sinks drain normal (fast) now...." Read more

    "Perfect fit for under the kitchen sink. Does the job well - no more slow draining, water backing up, or gurgling." Read more

    6 customers mention4 positive2 negative

    Customers are mixed about the quality of the valve. Some mention it's high quality, well made, and durable, while others say that it doesn't open about a third of the way.

    "High quality and easy to install" Read more

    "Just the pipe showed up today. No valve. According to reviews and pictures the valve and pipe were included...." Read more

    "Seems like a well made valve but it seems to not open about a third of the time..." Read more

    "Remarkable little product. It immediately took care of poor drainage in a sink with inadequate venting...." Read more

    great for vessel sinks
    5 Stars
    great for vessel sinks
    I had two very very slow draining vessel sinks. These fit in line perfectly and the sinks drain normal (fast) now. Was easy to install but then I'm around construction a lot. Comes just like the picture so you DONT have to buy an extra Redi Vent. That wasn't clear when I got it. Love these. Will put on all my (unvented) vessel sinks.
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    Top reviews from the United States

    42
    5.0 out of 5 stars Easy to Install
    Reviewed in the United States on January 26, 2024
    Verified Purchase
    This fits perfectly if you have enough horizontal space to work with in your trap arm. All of my trap piping is 1-1/2" so I did not need to deal with transitioning from 1-1/4". It probably took me more time to empty the cabinet under the sink and then replace the things afterward than it took me to install this kit.
    Helpful
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    JVas
    5.0 out of 5 stars VENT w/TEE COME TOGETHER IN THIS PACKAGE AND THEY WORK GREAT!
    Reviewed in the United States on December 10, 2018
    Verified Purchase
    I want to provide some clarification. The posting is somewhat misleading because it states "Tee for Vent", instead of "Tee WITH Vent" which is what it should state since both pieces are includes. Due to the posting and some of the customer reviews I read, I thought the vent was sold separately and ended up buying a duplicate vent separately for $13, but it was already included in this package. I was able to resolve by calling Amazon and getting a refund for the extra unused piece which I asked to return, and also was granted a $5 credit because the rubber gasket was missing from the box (I had to make a trip to the hardware stop and buy separately since I needed to install vent immediately).

    I must say, after seeing Youtube videos of this baby in action and testing it for myself, IT WORKS WONDERFULLY! The velocity of the waterflow increased substantially! I used my cell phone to film the water flow (faucet open at it's max) before and after installation to my 1.5 inch pipes, and the time it took to drain was virtually cut by about 70 - 75%. At maximum water pressure, after 30 seconds of running the water, the water still kind of accumulates but no more than 1/2 inch and once shut off it now takes about 5 seconds to drain which is so much quicker than what it was taking before (30-35 seconds). For this price, both pieces are a bargain, I'm so happy with it and HIGHLY RECOMMEND for everyone experiencing delays with draining, especially anyone with a basin sink!
    14 people found this helpful
    Helpful
     Report
    Rae
    4.0 out of 5 stars AAV is a lifesaver
    Reviewed in the United States on January 30, 2020
    Verified Purchase
    My only issue with this is that the pipe is somewhere between sizes and I wasn't able to attach it to either a 1.5" or a 1.25" coupler. I ended up tossing the pipe aside and just using the air admittance valve. This item works great.
    One person found this helpful
    Helpful
     Report
    Scott Raney
    5.0 out of 5 stars Don't understand why the big box stores don't carry these
    Reviewed in the United States on April 28, 2024
    Verified Purchase
    I usually purchase building materials at big box stores because even one-day shipping is not fast enough, but for some reason they don't stock these, and when you find out there's not room for plumbing an AAV using regular PVC or ABS fittings (often due to weird customer choice of vanity), these are a lifesaver.
    Helpful
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    Steve Beaverton OR
    1.0 out of 5 stars Nope
    Reviewed in the United States on January 1, 2024
    Verified Purchase
    Bought this to replace an existing ten year old unit as kitchen sink was slow to drain and simply removing the unit let it drain immediately and quickly. Decided to take the easy route and order the exact same product as the original. Well that did not work as expected. Original was made in the USA, replacement in China. The replacement made the problem worse.
    Helpful
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    lizziebeth
    5.0 out of 5 stars Does the job!
    Reviewed in the United States on March 9, 2024
    Verified Purchase
    After reviewing YouTube, I bought this to stop the gurgling in my kitchen sinks. I found out that a local vent was needed to provide air and would alleviate the gurgling. I added this pipe with the vent to my existing pipes after cutting up piece of the existing pipe out, and no more gurgling.
    Helpful
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    Lee.Wireless
    5.0 out of 5 stars Solves problem
    Reviewed in the United States on September 1, 2023
    Verified Purchase
    High quality and easy to install
    Helpful
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    Russ K.
    5.0 out of 5 stars Very good to have this option.
    Reviewed in the United States on September 4, 2023
    Verified Purchase
    I have some old galvanized drain pipe in my house and have been slowly replacing it with PVC. In my kitchen I intended to replace the drain stack but keep the vent stack (which I'd buried in an exterior wall behind the kitchen cabinets). However, the vent pipe was rusted and broke in the transition from the wall to the attic.

    Rather than having to pull out the cabinets and tear into the wall, I was able to cap off that old vent to prevent sewer gasses from coming in, then installed this AAV under my sink.

    Just be mindful of code. For my state, I'm allowed to use this for my kitchen sink/dishwasher, because I have at least one other vent in my drainage system that goes out through the roof. Do not use these to replace all vents or you won't have a place for the gasses to go.

    When I have the opportunity to remodel the kitchen, I'll open the wall and replace that old roof vent with PVC and take out the AAV. But for the price and simplicity, this was a huge win to hold me over and save immediate expense.

    Last note for those pointing out the height. The plumbing code in my state calls out that an AAV under a sink needs to be at least 4" above the trap. That's the reason for it going up. Other codes (IPC and UPC) are probably similar, but I didn't look. Also, this must be between the trap and the wall (i.e. after the trap in terms of drainage flow). Do not put this between the trap and the sink (before the trap), or it won't actually do anything, and you'll risk a siphon clearing your trap and having the sewer gasses coming up through your sink.
    Helpful
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    Top reviews from other countries

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    Carmen
    5.0 out of 5 stars Práctico y funcional
    Reviewed in Mexico on January 10, 2021
    Verified Purchase
    Fue excelente para el desagüe de mi tarja, fácil de colocar aunque algo caro.
    Report
    ANDRES MOYSEN
    4.0 out of 5 stars Funcionalidad
    Reviewed in Mexico on July 30, 2023
    Verified Purchase
    Si funciona el respirador y eliminando los olores del drenaje
    Report