Plumbing Forum - Professional & DIY Plumbing Forum > General Plumbing Discussion > General Plumbing Help > adding a trap



Reply
 
Thread Tools Display Modes
Old 01-06-2013, 01:03 PM   #1
canadaguy
Junior Member
 
Join Date: Jan 2013
Posts: 5
Default adding a trap

I have recently moved my washing machine and had to add a new drain line for , i had relizes yesterday that there in no trap , i have attached some pics , the first shows what i have , and the second one shows what i would like to do , just want to make sure that it is ok.
Thanks



P1060562.JPG   P1060563.jpg  
__________________

Last edited by canadaguy; 01-06-2013 at 06:47 PM.
canadaguy is offline  
 
Reply With Quote Quick reply to this message
Old 01-06-2013, 01:34 PM   #2
phishfood
Moderator
PLF_MODERATOR.png
 
Join Date: Jan 2010
Location: Orlando, FL
Posts: 4,619
Liked 565 Times on 455 Posts
Likes Given: 767

Default

That would be a running trap, prohibited by code.

It needs to be on the other side of what I am assuming is the vent. The pipe that the washing machine discharges into needs to attach to the top of the trap, and continue vertical for at least 18", preferably 24"-30". There can be offsets in that vertical pipe. The drain side of the trap needs to connect to the horizontal as it would in your picture, but it needs to be on the other side of what I am assuming is the vent.



__________________

Lake County, Florida plumber
Springtime Plumbing Services, LLC
License #11067533
352-433-1912

phishfood is offline  
johnjh2o Likes This 
Reply With Quote Quick reply to this message
Old 01-06-2013, 05:50 PM   #3
canadaguy
Junior Member
 
Join Date: Jan 2013
Posts: 5
Default

so if i put it the way i have in the pic is it that bad ? what problems would i get . thanks

__________________
canadaguy is offline  
 
Reply With Quote Quick reply to this message
Old 01-06-2013, 06:00 PM   #4
johnjh2o
Senior Member
 
johnjh2o's Avatar
 
Join Date: Jul 2011
Location: Melbourne, Florida
Posts: 2,657
Liked 456 Times on 358 Posts
Likes Given: 309

Default

The trap would siphon and allow sewer gas into your home. Which will cause a health hazard.

John

__________________
johnjh2o is offline  
 
Reply With Quote Quick reply to this message
Old 01-06-2013, 06:41 PM   #5
canadaguy
Junior Member
 
Join Date: Jan 2013
Posts: 5
Default

Quote:
Originally Posted by johnjh2o View Post
The trap would siphon and allow sewer gas into your home. Which will cause a health hazard.

John
if the sewer line is to the right when looking at pic how would sewer gas siphon
P1060562.JPG  
__________________

Last edited by canadaguy; 01-06-2013 at 06:49 PM.
canadaguy is offline  
 
Reply With Quote Quick reply to this message
Old 01-06-2013, 06:59 PM   #6
johnjh2o
Senior Member
 
johnjh2o's Avatar
 
Join Date: Jul 2011
Location: Melbourne, Florida
Posts: 2,657
Liked 456 Times on 358 Posts
Likes Given: 309

Default

For one the momentum of the washer waste would siphon the trap. Plus if that line is also serving a sink on the other side of the wall you are know DBL traping the sink. Which is also not permitted.

John

__________________
johnjh2o is offline  
 
Reply With Quote Quick reply to this message
Old 01-06-2013, 08:56 PM   #7
stevemachine
Senior Member
 
stevemachine's Avatar
 
Join Date: Jul 2012
Location: edmonton, alberta
Posts: 789
Liked 90 Times on 78 Posts
Likes Given: 92

Default

Yeah definitely not a good idea and it will siphon the trap like John said. Also like John said you can't double trap. There's a couple ways you can re do it properly. I feel the best way is to on the vertical piece for the washer put in a sanitary tee, on the top of tee connect a vent, best way is if you have a vent already that you can tie into, or you could do an AAV for a vent. Then off of the side outlet you put in piece of pipe that is minimum 2x diameter of pipe ex. If pipe is 1 1/2 you need a 3 inch long piece between trap and tee. Then you need a 24" piece coming up vertically on the other end of the trap. The top of that 24" piece must be 36" off the floor, if its not then make the 24" piece longer. These are all minimums I have stated. And off the top of the tee, your vent must be tied in above flood level rim of the washer, so if the drain backs up then the vent doesn't act as a secondary drain. And I'd suggest a cleanout, I'd install it in the vertical portion either above or below the sanitary tee, I'd put it in the vent portion, and lastly be sure to use a union trap. Technically speaking laundry needs to be 2" drain according to code. These codes are all based in Canada FYI in alberta specifically, so they all should apply to you. Best of luck if you have any questions let us know!

__________________

If you don't learn something new everyday at work, it's not even worth going.

stevemachine is offline  
 
Reply With Quote Quick reply to this message
Old 01-06-2013, 10:29 PM   #8
canadaguy
Junior Member
 
Join Date: Jan 2013
Posts: 5
Default

so can this be done . thanks

P1060565.jpg  
__________________
canadaguy is offline  
 
Reply With Quote Quick reply to this message
Old 01-06-2013, 10:34 PM   #9
johnjh2o
Senior Member
 
johnjh2o's Avatar
 
Join Date: Jul 2011
Location: Melbourne, Florida
Posts: 2,657
Liked 456 Times on 358 Posts
Likes Given: 309

Default

Your DBL trapping the sink.

John

__________________
johnjh2o is offline  
 
Reply With Quote Quick reply to this message
Old 01-06-2013, 10:38 PM   #10
phishfood
Moderator
PLF_MODERATOR.png
 
Join Date: Jan 2010
Location: Orlando, FL
Posts: 4,619
Liked 565 Times on 455 Posts
Likes Given: 767

Default

Canadaguy, I must apologize. I totally missed that the drain line you are tied into serves a bathroom sink.

If I am now understanding the piping arrangement correctly, I see only one good way of doing this. You need to add a sanitary tee to the biggest pipe, the one in the middle. With a 2" branch, then a tee on it's back for a vent, then a minimum of 4" of 2" pipe to the Ptrap for the laundry, and then the 24" riser for the washing machine.

The way it is currently piped is going to cause troubles with the lavatory trap without considerable reworking.



__________________

Lake County, Florida plumber
Springtime Plumbing Services, LLC
License #11067533
352-433-1912

phishfood is offline  
 
Reply With Quote Quick reply to this message
Reply


Quick Reply
Message:
Options

Thread Tools
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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Adding onto my house. hujh2012 General Plumbing Help 1 04-28-2012 04:57 AM
Adding onto my house. Widgeonus General Plumbing Help 3 09-20-2010 11:57 PM
Chrome Trap arm to ABS Trap? ChuckG General Plumbing Help 5 08-04-2010 10:03 PM
Adding a gas line for my BBQ. Chris General Plumbing Help 15 03-13-2010 04:06 PM
Adding a sink artaman General Plumbing Help 5 03-02-2010 02:32 PM