(206) 949-5683, Top Rated Plumber, Seattle
Results 1 to 7 of 7

Thread: In-wall vent for waterfall drain?? Air Admittance Valve or cheater vent

  1. #1
    DIY Junior Member conroyt's Avatar
    Join Date
    May 2012
    Location
    New Mexico
    Posts
    3

    Default In-wall vent for waterfall drain?? Air Admittance Valve or cheater vent

    I just had the great idea to install a waterfall in my upstairs interior wall. The pump and drain are located 1-floor below in the basement utility room.
    I've been having problems with siphoning of the upstairs waterfall drain. Sometimes the drain backs up and overflows (BIG problem), and upon waterfall start-up it will sometimes not start flowing until it gives a great big burp.
    My local plumber (great guy!) who installed the unit per manufacturers instructions tells me I need a vent near the upstairs drain. To make a long story short, the only place to vent the drain will be inside the interior wall. He suggests using a mobile-home type vent. The water being vented is always clean and will not emit noxious gases. I am slightly concerned about the potential for mold, so am thinking of putting a screen/air-vent type cover in the wall over the vent to allow for air circulation. I live in arid New Mexico.
    Is this a terrible idea or an acceptable solution? Thanks for your expertise.

  2. #2
    Forum Admin, Expert Plumber Terry's Avatar
    Join Date
    Aug 2004
    Location
    Bothell, Washington
    Posts
    14,195
    Blog Entries
    1

    Default

    Any AAV needs access to air. Whenever an AAV is installed in a wall, it needs a grill that allows air.
    That would be a good fix for your problem.

    This is a good lesson for all. You can't run a fixture from the top floor and try to "trap" on the floor below.
    The draining water develops so much speed, that it siphons the trap dry. Or installing a trap without a vent also will siphon. Plumbing 101



    Oatey Sure-Vent Wall Box
    Last edited by Terry; 05-31-2012 at 03:49 PM.

  3. #3
    DIY Junior Member conroyt's Avatar
    Join Date
    May 2012
    Location
    New Mexico
    Posts
    3

    Default

    Terry,
    Thanks for the fast response. Is there any difference between an AAV and a "cheater vent"?

  4. #4
    Forum Admin, Expert Plumber Terry's Avatar
    Join Date
    Aug 2004
    Location
    Bothell, Washington
    Posts
    14,195
    Blog Entries
    1

    Default

    Cheater Vent.
    Who makes something called a Cheater? I would love to see someone try to market that name.

    AAV stands for Air Admittance Valve. That's the term that the plumbing industry uses.

    Has anyone ever seen something marketed as a "cheater vent"?
    Last edited by Terry; 05-31-2012 at 04:08 PM.

  5. #5
    DIY Junior Member conroyt's Avatar
    Join Date
    May 2012
    Location
    New Mexico
    Posts
    3

    Default

    I think I'm answering my own question. Looks like cheater vents are just certified for mobile homes, not site built homes.






    http://www.google.com/imgres?imgurl=...9QEwAA&dur=504

    http://www.muskokahomeinspection.ca/...skoka-Midland+
    Last edited by Terry; 04-27-2013 at 12:00 PM.

  6. #6
    Forum Admin, Expert Plumber Terry's Avatar
    Join Date
    Aug 2004
    Location
    Bothell, Washington
    Posts
    14,195
    Blog Entries
    1

    Default

    That thing that Home Depot sells isn't a legal vent.
    But then a lot of what Home Depot sells won't pass a plumbing inspection. It drives the inspectors nuts, having the tell the homeowner that they installed the wrong parts.



    NOT LEGAL
    Last edited by Terry; 04-27-2013 at 12:02 PM.

  7. #7
    DIY Senior Member Chad Schloss's Avatar
    Join Date
    Jun 2010
    Location
    USA
    Posts
    327

    Default

    "That thing that Home Depot sells isn't a legal vent. "


    but it is actually labeled as a cheater vent, lol. now that's funny

Similar Threads

  1. Can you tie lav drain into a toilet vent (wet vent)? W/SKETCH
    By kmuddzy in forum Plumbing Forum, Professional & DIY Advice, Tips & Tricks
    Replies: 6
    Last Post: 01-27-2012, 10:15 AM
  2. In-Line Vent vs. Air Admittance Valve?
    By dzd9fy in forum Plumbing Forum, Professional & DIY Advice, Tips & Tricks
    Replies: 10
    Last Post: 07-11-2010, 01:15 PM
  3. in-wall drain vent allowing septic smell to seep in?
    By acthungpv in forum Plumbing Forum, Professional & DIY Advice, Tips & Tricks
    Replies: 13
    Last Post: 10-26-2008, 07:35 PM
  4. Dishwasher drain air-gap -- cheater vent?
    By gardner in forum Plumbing Forum, Professional & DIY Advice, Tips & Tricks
    Replies: 7
    Last Post: 04-08-2007, 06:36 PM
  5. Can I vent New bathroom vent into dryer vent line?
    By cwolters in forum Shower & bathtub Forum & Blog
    Replies: 3
    Last Post: 04-25-2005, 04:03 PM

Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •