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 06-04-2010, 08:14 AM   #1
Member
 
Join Date: Aug 2008
Posts: 62
Share |
Default

Laundry room remodel


I have moved my laundry room to my walk out basement. How important is it to have a vent pipe for the washing machine drain. The basement drain connects to part of the original drain right where the drain enters the ground in the crawl space. I had to remove a portion of the old drain to make the connection which makes the basement drain not vented. Do I have a pbm? The old vent connected in the exterior wall of the ldry rm just after the p trap. I can reconnect the new portion of the basement drain to the old drain thus reconnecting the vent to the new drain, but the vent pipe will be 6 or 7 feet from the basement p trap. Will that be a pbm?


Last edited by pinkertonpv; 06-04-2010 at 08:32 AM. Reason: added info
pinkertonpv is offline   Reply With Quote
Old 06-04-2010, 09:05 AM   #2
Doing it myself
 
Alan's Avatar
 
Join Date: Apr 2006
Location: Crescent City, CA
Posts: 3,738
Send a message via AIM to Alan Send a message via MSN to Alan
Default

Laundry room remodel


Yes, you need a vent.

Yes, you can connect old drain to old vent, and connect new vent to old drain. Make sure you have the proper configuration of vent before your p-trap.

__________________
Journeyman Plumber
Alan is offline   Reply With Quote
Old 06-04-2010, 10:35 PM   #3
Member
 
Join Date: Aug 2008
Posts: 62
Default

Laundry room remodel


I have attached a line diagram of the two drain lines and the vent line. Not real clear but the vent will be 6 or 7 ft downstream from the p trap. Will it work OK? Reduce the size of the diagram if necessary and rotate till you get proper alignment.
Attached Files
File Type: pdf drain to vent dgm.pdf (69.8 KB, 186 views)
pinkertonpv is offline   Reply With Quote
Old 06-05-2010, 12:24 AM   #4
Doing it myself
 
Alan's Avatar
 
Join Date: Apr 2006
Location: Crescent City, CA
Posts: 3,738
Send a message via AIM to Alan Send a message via MSN to Alan
Default

Laundry room remodel




Your vent has to be vertical at least 6" above the flood level rim.

The way you were describing it, it sounded like it would be ok, but given the diagram above, that is not legal.
__________________
Journeyman Plumber
Alan is offline   Reply With Quote
Old 06-05-2010, 06:23 AM   #5
Member
 
Join Date: Mar 2010
Posts: 77
Default

Laundry room remodel


depends where you are located and what codes are observed as to it's legality, in philadelphia it would be legal and work with no problem.
we are allowed 12' branch from vented line for single fixture
just a guy is offline   Reply With Quote
Old 06-05-2010, 07:30 AM   #6
Member
 
Join Date: Aug 2008
Posts: 62
Default

Laundry room remodel


Thanks for commenting. I want to do what's right, but mainly I want it to work correctly. The vent pipe will not be any different from the original washer drain system. Still where it originally was and extending thru the roof. the end result when I reattach the pvc I cut to add the new drain will be that the vent pipe will be 6-7 feet behind the p trap for the new washer. Distance of fall will be the same. My concern now is will that 6-7 ft between the p trap and the vent pipe opening be a pbm. I am thinking from you guys comments that this will work OK, just may not be up to code. Is that right?
pinkertonpv is offline   Reply With Quote
Old 06-05-2010, 09:16 AM   #7
Member
 
Join Date: Aug 2008
Posts: 62
Default

Laundry room remodel


I have tested the drain several times and the water flows freely. P trap appears to work fine. Next is to reattach vent.
pinkertonpv is offline   Reply With Quote
Old 06-05-2010, 11:38 AM   #8
Doing it myself
 
Alan's Avatar
 
Join Date: Apr 2006
Location: Crescent City, CA
Posts: 3,738
Send a message via AIM to Alan Send a message via MSN to Alan
Default

Laundry room remodel


Quote:
Originally Posted by just a guy View Post
depends where you are located and what codes are observed as to it's legality, in philadelphia it would be legal and work with no problem.
we are allowed 12' branch from vented line for single fixture
I doubt with the vent going horizontally right off the drain.
__________________
Journeyman Plumber
Alan is offline   Reply With Quote
Old 06-05-2010, 11:40 AM   #9
Doing it myself
 
Alan's Avatar
 
Join Date: Apr 2006
Location: Crescent City, CA
Posts: 3,738
Send a message via AIM to Alan Send a message via MSN to Alan
Default

Laundry room remodel


I seriously doubt with the way you have drawn it, that it's going to work right at all. With the vent horizontal so low, you're going to have suds and water backing up into the vent. The vent can't work properly if it's full of water, and it's only a matter of time before the vent clogs completely with soap scum, dirt, and lint.
__________________
Journeyman Plumber
Alan is offline   Reply With Quote
Old 06-05-2010, 12:28 PM   #10
Member
 
Join Date: Aug 2008
Posts: 62
Default

Laundry room remodel


Alan, my dwg was a pretty bad in depicting the precise configuration of the vent vs drain. The vent is never horizontal. The vent drops 3 feet from the ptrap to where it connects to the PVC going underground and out of the crawl space. A Portion of the old W/M drain is now used as the vent. There is not much chance of water backing up into the vent unless there is a clog in the lines. I have drawn another diagram showing floor joists, crawl space, ground and pipe to better clarify. Do you think this will work OK?

I do appreciate your help and apologize for causing confusion. I have reconnected the old drain line now used as a vent.
Attached Files
File Type: pdf Vent diagram 2.pdf (74.7 KB, 104 views)
pinkertonpv is offline   Reply With Quote
Old 06-05-2010, 12:49 PM   #11
Doing it myself
 
Alan's Avatar
 
Join Date: Apr 2006
Location: Crescent City, CA
Posts: 3,738
Send a message via AIM to Alan Send a message via MSN to Alan
Default

Laundry room remodel


That still would not fly here, but you should consult your local code to be sure.

The vent should come off the top of the trap arm, meaning that the p-trap should not be above the vent opening by more than one pipe diameter.

I'm not saying it will or won't work, but it looks like you'll end up with a siphoning problem there.
__________________
Journeyman Plumber
Alan is offline   Reply With Quote
Old 06-05-2010, 02:12 PM   #12
Member
 
Join Date: Aug 2008
Posts: 62
Default

Laundry room remodel


Alan; I understand. What you are saying is besides the code, the configuration I have may siphon the water from the p trap and allow gases back into the house? If that occurs I may add an air admittance valve just behind the p-trap if i can find one small enough to fit. Appreciate you advice and info.
pinkertonpv is offline   Reply With Quote
Old 06-05-2010, 10:30 PM   #13
Member
 
Join Date: May 2010
Posts: 31
Default

Laundry room remodel


try this
Laundry room remodel-vent-diagram-2.jpg
fpeftw is offline   Reply With Quote
Old 06-05-2010, 11:04 PM   #14
Doing it myself
 
Alan's Avatar
 
Join Date: Apr 2006
Location: Crescent City, CA
Posts: 3,738
Send a message via AIM to Alan Send a message via MSN to Alan
Default

Laundry room remodel


Quote:
Originally Posted by fpeftw View Post
That isn't legal either as far as I know.
__________________
Journeyman Plumber
Alan is offline   Reply With Quote
Old 06-06-2010, 12:15 AM   #15
Member
 
Join Date: May 2010
Posts: 31
Default

Laundry room remodel


ok, why?

fpeftw 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
Basement laundry room secutanudu Electrical 9 04-23-2010 03:23 PM
Laundry Room Drain Set-Up - is it okay? bmb2m9 Plumbing 1 02-02-2010 10:49 PM
Laundry room plumbing mikev88 Plumbing 1 01-01-2010 03:10 PM
Options for partition in laundry room...? butterdog Building & Construction 1 12-08-2009 12:29 AM
Supply and Return from Laundry Room bjstewa HVAC 7 03-02-2007 11:39 PM




Top of Page | View New Posts

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