Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Plumbing

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Search this Thread Display Modes
Old 11-29-2007, 03:15 PM   #1
Member
 
Join Date: Nov 2007
Posts: 67
Share |
Default

venting drain problem


We have had the kitchen sink drain in the basement clogging every few months and I would always use a regular 25' manual snake to clear the clog however this time no amount of snaking did the trick, neither did any type of drain cleaner so I called a Specialist who came and totally cleared the drain, when finished he told me that the air vent should not have been under the level of the sink, it should be placed over the sink, the air vent apparatus is a black plastic screw-on device when screwed on tightly, the water doesn't flow, when slackened, the water flows smoothly down the drain so he left it half-way screwed on and it was flowing ok but a few hours after he left it stated flowing slowly so I uncrewed the air apparatus and then slightly screwed it back on only using like one to two threads and the water is now flowing totally smooth again.

My questions are first, why wasn't there an air issue all these years when I would snake the pipe when clogged and water would flow smoothly? When asked, he did not have an answer for this. Next, Until I can get the air vent restructured, can I expect any problems having the air apparatus barely screwed on? Or rahter, can anyone explain how this air apparatus is supposed to work please? When I look inside it, I am seeing a flat round pice of plastic blocking any air from flowing to the top of the unit, I am wondering if this wasn't supposed to have a damper or something to regulate the air flow? The way it is designed makes no sense to me?

mikehende is offline   Reply With Quote
Old 11-29-2007, 03:26 PM   #2
Member
 
Join Date: Jul 2007
Location: Jacksonville, FL
Posts: 886
Default

venting drain problem


http://www.studor.net/

Sounds like you have a malfunctioning studor vent.

Most are installed above the drain horizontal plane

Big Bob is offline   Reply With Quote
Old 11-29-2007, 03:29 PM   #3
Member
 
Join Date: Nov 2007
Posts: 67
Default

venting drain problem


From part of your link which reads:

Quote:
When a plumbing fixture is operated, negative pressure causes the AAV to open, allowing air to enter and equalize the pressure in the system. When the flow stops, gravity closes the valve preventing sewer gas from escaping through the valve into the building.
This tells me that the air apparatus on there is supposed to have a "valve" which opens and closes? Is this correct?
mikehende is offline   Reply With Quote
Old 11-29-2007, 03:33 PM   #4
Journeyman Plumber
 
Ron The Plumber's Avatar
 
Join Date: Jun 2006
Location: Eugene, Oregon
Posts: 1,994
Default

venting drain problem


Yes a spring loaded diaphragm.
__________________
Fix it right the first time, so you won't have to fix it a 2nd time.

2008 Oregon Specialty Plumbing Codes
Ron The Plumber is offline   Reply With Quote
Old 11-29-2007, 03:33 PM   #5
Member
 
Join Date: Jul 2007
Location: Jacksonville, FL
Posts: 886
Default

venting drain problem


yes, but studor vents are really simple things Take a good look at yours and then check one out at the big box store. That flat plastic might be your valve. It might be getting stuck...
Big Bob is offline   Reply With Quote
Old 11-29-2007, 03:45 PM   #6
Member
 
Join Date: Nov 2007
Posts: 67
Default

venting drain problem


When we looked at the AAV [Finally got the terminology right?], what we saw was a flat round piece of plastic, looks like it may have been a factory defect then as this did not have any spring which we could see? I will have to take a much closer look and also visit Home Depot and have a close look at another similar to know for sure but what's in there is certainly NOT movable. At any rate, is it ok for me to have screwed on the AAV only a very little? Until I can have this corrected?
mikehende is offline   Reply With Quote
Old 12-03-2007, 01:13 PM   #7
Member
 
Join Date: Nov 2007
Posts: 67
Default

venting drain problem


The AAV looked the same at Home Depot so doesn't look like anything's wrong with the exisitng AAV unless it's malfunctioning. Yesterday we got some issues relating to this vent, I saw some water coming from underneath the cupboard, when I looked, the vent had fallen off the pipe, I screwed it back in using 4 threads this time instead of 2, water started leaking right there again, I screwed it half-way down and this worked best yesterday so I'll have to wait and see, what's going on here, is water supposed to backup and leak right there just becuase of how tight or loose the AAV is screwed on?
mikehende is offline   Reply With Quote
Old 12-03-2007, 01:56 PM   #8
Oldguy
 
Rehabber's Avatar
 
Join Date: Dec 2005
Location: Calif (the left coast)
Posts: 498
Default

venting drain problem


The water should not back up to the AAV. You still have a drainage problem

__________________
If you think you can, or if you think you can't, you're probably right.

ASE certified master auto tech, Retired.
Rehabber is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Problem with tub drain lineup dotwell Plumbing 2 10-21-2007 08:58 AM
Washer drain peloncito Appliances 7 08-04-2007 12:56 AM
Slot Drain Problem keredwh Building & Construction 5 07-25-2007 07:51 AM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.