How to Install a Drain with an Air Admittance Valve

Here are some tips for installing the drain plumbing for your kitchen or bathroom sink. Everybody will have slightly different placement of trap vent and sink drain, so you may require slightly different components. The P-trap and Air Admittance Valve work together to allow the pipes to both drain properly as well as prevent sewer gas from escaping. The Air Admittance Valve, AAV, or Studor Vent, is a handy alternative when you can't access a full vent stack. Different models of AAV may have different installation requirements so be sure to follow the directions in the package.
Studor Mini-Vent AAV: amzn.to/3Emx650
Hope you found this video helpful! Leave a comment down below with any questions or thoughts.
Please subscribe to our channel if you like our videos. Thank you for your support.

[@richardstefanello8599]

Watched this video 3 times. When it came to installing the drain, it took me less than 40 mins. Thank You

[@practicalhomeprojects]

Glad you found it helpful!

[@jacksplumbingvideos7147]

Most codes dont allow more than one slip nut after the trap, you have six. After the trap you should use pipe that glues or screws together.

[@victoriacalbert8953]

Thanks for sharing this. This is the same setup for my sink.

[@winstondietz]

Great video, thanks.

[@practicalhomeprojects]

You're welcome!

[@glenjones9463]

Need plumbers buddy and pipe dope

[@bakernathan98]

Where did you get your drain I would like a model that doesn't require plumbers putty but cant find one ?

[@AndrewHeben]

Any chance you could provide a link or more details on the two threaded adapters you used to connect the AAV?I can’t seem to find the right fit and have the same AAV product.

[@practicalhomeprojects]

While I got the main kits in the Polypropylene section, these particular pieces came from the big selection of PVC adapters. I just puzzled adapters in the store together until it all fit. I used a female thread/female glue and a female thread/male glue and glued them together to make a double threaded female adapter. www.homedepot.com/p/NIBCO-1-1-2-in-PVC-DWV-Street-Spigot-x-FIPT-Female-Adapter-C48032HD112/100677972 www.homedepot.com/p/NIBCO-1-1-2-in-PVC-DWV-Hub-x-FIPT-Female-Adapter-C4803HD112/100677994

[@yippiecahier9253]

Isn't the AAV supposed to be above the bottom of the sink by code? This is to prevent liquid from coming back up through the valve in the event of a clog down the line.

[@practicalhomeprojects]

Hi, great question. The home does need to have a main vent stack that extends above the sink. Our AAV is only servicing the one sink, so the requirements are more lenient for this one fixture. Also, the one-way mechanism in the AAV is surprisingly good at preventing overflow in the case of a back up. See UPC P3114.4 "Individual and branch air admittance valves shall be located not less than 4 inches (102 mm) above the horizontal branch drain or fixture drain being vented. Stack-type air admittance valves shall be located not less than 6 inches (152 mm) above the flood level rim of the highest fixture being vented."

[@johnsvideo3403]

AAV are against code in some states...like mine. May want to check before you use them.

[@practicalhomeprojects]

Hi there. It's definitely a good idea to check with your local jurisdiction. Codes change every few years as well, so maybe with some luck your state will permit them one day as the technology becomes established.

[@centurionforce]

@@practicalhomeprojects Don't you have a vent in the wall already? Why rely on something mechanical? Also, UPC does not allow more than 1 compression fitting downstream of the trap- you have umpteen.....

[@cn81821]

👍👍👍💪💪💪

[@acreguy3156]

Isn't the electrical plug in the cabinet illegal? I assume it feeds power to a garburator or other appliance like the dishwasher? It needs to be ground faulted. Better still, it needs to outside the cabinet?

[@feildmaster]

This is true, for new construction. Old code didn't require any GFCI for dishwasher or disposals. So if you repair/work on the old stuff you would need to update those sockets.

[@acreguy3156]

@@feildmaster Thanks 👍.

[@jordanlosey4596]

@@feildmaster Also @acreguy3156, just because there isn't a GFCI receptacle in the cabinet doesn't mean it isn't protected. If there is a GFCI receptacle, upstream from that plug, then the rest of the circuit is also protected. There could also be a GFCI breaker in the panel for that circuit. I'm not saying it is protected, but it could be.

[@mattnorman4007]

Can you have the valve BEFORE THE U-BEND?

[@practicalhomeprojects]

Hi Matt, If I understand, you are asking if we could place the AAV on the section of pipe in between the sink and the U-Bend. The answer is No. In order to prevent the siphoning of water out of the U-Bend, the AAV must be placed afterwards.

[@mattnorman4007]

@@practicalhomeprojects thanks. I have a twin Belfast sink with no overflow. When I run the tap on the left hand side the right hand sink will fill up from below. I assume it's siphoning as you described

[@lagunabay51]

What's with the Elvis side burns.. Give it up

[@ericneering6357]

When it comes to rules regulations and permits of your homeowner and you’re fixing this yourself and you’re an American I don’t understand why as a homeowner any of this stuff applies that the people say, in the comments remember if you don’t meet minimum code and ain’t, nobody’s fault, but your own And just because there’s rules for license builders doesn’t mean a homeowners can’t just works what works for them why does Americans keep doing this pushing their will upon others

[@cliveross1800]

I think it has much to do with the codes, rescue teams hate trying to revive people after getting wet and shocked, !!

[@bb590]

Its NOT 90 degrees! Its gravity sealed. Your AAV is not correct.

[@practicalhomeprojects]

Can you elaborate?

[@bb590]

@@practicalhomeprojects your aav should be perpendicular to the floor. Your aav is tilted. It works by gravity! You didnt read the instuctions. It cant be off by more than a few degrees.

[@practicalhomeprojects]

The instructions state that the AAV must be installed within 15 degrees of vertical and our installation was well within those bounds. I'll go ahead and an extra line in the description in case other viewers have a similar question.

[@Everclearish]

​@@practicalhomeprojects -- You did good.