"S" Trap Configuration Help


  #1  
Old 02-05-07, 08:19 PM
A
Member
Thread Starter
Join Date: Mar 2003
Posts: 62
Received 0 Votes on 0 Posts
"S" Trap Configuration Help

Inspector came out today and noted an "S" trap under the bar sink.
I was not home and was unable to speak with him about it and am not exactly sure what is wrong with this configuration.

Here is a link to a pic:

http://home.earthlink.net/~alkeeney/kitchensink2.jpg

Note the DWV coming out of the wall under the plug and going to the left. This comes out of the wall because we didn't want to cut holes through four 2x4's holding up the header for the window above. The brown line shows where this DWV heads off to the main kitchen sink about 8 feet to the right. The main kitchen sink has it's own vent.

The Red Vertical line is a vent stack that connects both the main sink drain and the bar sink drain. The DWV goes straight down at this point and then connects outside of the house to the septic line.

I thought that the horizontal (in white) kept this from being an "S" trap.

Is it possible that the inspector just didn't know that there was a vent and that this will take care of the problem?

We are in California and an air admittance valve is not acceptable, although the inspector said that something of this sort could be "overlooked" and make the drain work properly.

Need to have this corrected or a good explanation of why it works by the end of the week, so any help is greatly appreciated!

THANK YOU In Advance!
 
  #2  
Old 02-06-07, 04:11 AM
chandler's Avatar
Banned. Rule And/Or Policy Violation
Join Date: Dec 2005
Location: USA
Posts: 39,964
Received 6 Votes on 6 Posts
Your only shots at correcting this would be to install a revent from the top of the horizontal pipe to the existing vent pipe under the sink, or install an AAV, and request a reinspection and offer a cup of coffee and danish when he arrives. You say there may be a possibility of him allowing it. The AAV would be easier than the revent. Good luck!
 
  #3  
Old 02-06-07, 07:56 AM
F
Member
Join Date: Jan 2007
Location: Central Indiana
Posts: 389
Received 1 Vote on 1 Post
Re: "I thought that the horizontal (in white) kept this from being an "S" trap." - Nope, you have to look at the whole layout, not just an isolated area; you just elongated the S.

Re: "Is it possible that the inspector just didn't know that there was a vent and that this will take care of the problem?" - Nope, S-traps typically aren't allowed because they can (not always) cause problems, like pulling the water out of the traps.

You might try wet-venting the drain, that is, from your white horizontal piping, oversize the drain pipe and slope it to the connection at the base of the red vent stack. The slope and the oversize pipe gives water the bottom side of the pipe to use and vent air the upper side of the pipe.

AAV's are band aids, IMO.
 
 

Thread Tools
Search this Thread
 
Ask a Question
Question Title:
Description:
Your question will be posted in: