Plumbing Forum - Professional & DIY Plumbing Forum > General Plumbing Discussion > General Plumbing Help > Basement Bathroom Rough-In Drainage and Venting




Reply
 
LinkBack Thread Tools Display Modes
Old 08-10-2013, 11:46 PM   #1
dwipl
Junior Member
 
Join Date: Aug 2013
Posts: 3
Default Basement Bathroom Rough-In Drainage and Venting

Hello,

I'm hoping someone significantly more experienced with plumbing can help provide me some direction on redoing my basement bathroom plumbing. Here is the general information:

I'm in MN. I believe we use a version of UPC code here.
The existing bathroom was not installed with a permit and after some demo work we've found it isnt' to code.I'm working with city inspectors to resolve the issue. They are willing to work with me and provide direction.
My plan is to try dryfit and layout how I want the drainage and venting to be setup and have the inspector validate my configuration before I start any pvc welding / bonding.

Here is a very rough draft of what I'd like to accomplish.

You'll have to excuse my very layman understanding of plumbing and venting. The inspector suggested wet venting the WC with the lav. He informed me I'll have to use 2'' to allow the lav to server as a wet vent. The lav 2'' vent will cut across through the studs to the other 1.5'' dry vent of the shower and then I'll bring 2'' all the way back to the stack next to my washing machine.

Unfortunately after reading a lot of MN code and searching online I still feel pretty uninformed. I realize I have to be 6'' above the water spill line before I go horizontal on the vents.

Here is the existing work I need to remove still.



__________________
dwipl is offline  
 
Reply With Quote Quick reply to this message
Old 08-13-2013, 12:30 AM   #2
phishfood
Moderator
PLF_MODERATOR.png
 
Join Date: Jan 2010
Location: Orlando, FL
Posts: 4,256
Liked 388 Times on 326 Posts
Likes Given: 556

Default

I have been trying to post this since yesterday, had to email it to myself and download it.

Here is what you want to do.





__________________

Lake County, Florida plumber
Springtime Plumbing Services, LLC
License #11067533
352-630-5673
http://springtimeplumbingservices.411plumb.com/

phishfood is offline  
 
Reply With Quote Quick reply to this message
Old 08-13-2013, 03:00 PM   #3
dwipl
Junior Member
 
Join Date: Aug 2013
Posts: 3
Default

Thanks! That helps a lot. I'll probably need some clarification regarding the shower portion. I'll take some progress pictures and update my diagram to help make things clearer.

__________________
dwipl is offline  
 
Reply With Quote Quick reply to this message
Old 08-22-2013, 08:33 PM   #4
dwipl
Junior Member
 
Join Date: Aug 2013
Posts: 3
Default

Would this work?



__________________
dwipl is offline  
 
Reply With Quote Quick reply to this message
Old 08-22-2013, 09:21 PM   #5
johnjh2o
Senior Member
 
johnjh2o's Avatar
 
Join Date: Jul 2011
Location: Melbourne, Florida
Posts: 2,469
Liked 335 Times on 273 Posts
Likes Given: 220

Default

No, the vent for the tub is running horizontally below the flood rim of the highest fixture.

__________________

John

johnjh2o is online now  
phishfood Likes This 
Reply With Quote Quick reply to this message
Old 08-22-2013, 10:45 PM   #6
Dlehrke
Junior Member
 
Join Date: Aug 2013
Posts: 6
Liked 1 Times on 1 Posts

Default

Hey John. Thanks for the response, you seem to know what you're talking about. I'm a buddy of the OP and I created that last image as a better starting point. Would you mind if I pick your(and anyone else's) brain about a few things?

1. Does everything else look correct before(starting from the left) to that last(most right) 45 degree sanitary tee? I wasn't sure if that's all fine or if we should run the 3" farther before going down to the shower, or just use a reducer at the end instead of a 45 and the cap. If there's a better way to do any of it, we're all ears.

2. "the vent for the tub is running horizontally below the flood rim of the highest fixture" - could you expand on that? You're correct that it is whats happening, just to clarify, it goes over to the wall on a slight incline and then up. I'll add another image. Is this still wrong, I'm not really understanding any other way to do it... Oh, I think I might have just realized the cause of some confusion... the drain is for a shower only, not a tub. If nothing I've clarified changes anything, I'd be very grateful for any input on a correct solution.

Thanks for your time.



__________________

Last edited by Dlehrke; 08-22-2013 at 10:47 PM.
Dlehrke is offline  
 
Reply With Quote Quick reply to this message
Old 08-22-2013, 10:56 PM   #7
phishfood
Moderator
PLF_MODERATOR.png
 
Join Date: Jan 2010
Location: Orlando, FL
Posts: 4,256
Liked 388 Times on 326 Posts
Likes Given: 556

Default

The whole issue is that you need to turn up vertically directly underneath the shower vent before you run to the shower trap. This way, the horizontal section of piping will have a fixture draining water through it, keeping any debris flushed out, and that will prevent the horizontal pipe from getting clogged with said debris. The way you have it illustrated, there is a section of horizontal vent pipe that does not get washed out by the shower drainage.

You mention capping the drainage line, but in the first picture it appears as though the pipe continues, presumably picking up other fixtures?

__________________

Lake County, Florida plumber
Springtime Plumbing Services, LLC
License #11067533
352-630-5673
http://springtimeplumbingservices.411plumb.com/

phishfood is offline  
 
Reply With Quote Quick reply to this message
Old 08-22-2013, 11:45 PM   #8
Dlehrke
Junior Member
 
Join Date: Aug 2013
Posts: 6
Liked 1 Times on 1 Posts

Default

OOOOOOkkkkkay

I think I finally understand what you mean... I've created more images... so the vent pipe will actually be a above the rest of the drain by about a the height of a pipe.

The 3" does look like it continues in the first picture but it went to a clean out, it's our impression that that is not necessary.

Here's 3 options, perhaps you could let us know which is best or if it's a combination, which features work best.



__________________
Dlehrke is offline  
 
Reply With Quote Quick reply to this message
Old 08-23-2013, 12:02 AM   #9
Dlehrke
Junior Member
 
Join Date: Aug 2013
Posts: 6
Liked 1 Times on 1 Posts

Default

option 4 incase this works



__________________
Dlehrke is offline  
 
Reply With Quote Quick reply to this message
Old 08-23-2013, 12:09 AM   #10
phishfood
Moderator
PLF_MODERATOR.png
 
Join Date: Jan 2010
Location: Orlando, FL
Posts: 4,256
Liked 388 Times on 326 Posts
Likes Given: 556

Default

No, that still won't be to code. If you look at the drawing I posted earlier, in the little detail, you will see that the pipe is turned vertical, with a sanitary tee on the vertical pipe, then the pipe leading to the trap is attached to the side of the tee, with the vent attached to the top of the tee.

Run the pipe directly to the vent, the pipe leading to the Ptrap should not be attached to the horizontal pipe.



__________________

Lake County, Florida plumber
Springtime Plumbing Services, LLC
License #11067533
352-630-5673
http://springtimeplumbingservices.411plumb.com/

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
Trackbacks are Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Basement bathroom venting help!!! Jpaulson12 General Plumbing Help 2 02-11-2013 08:48 PM
Basement Bathroom Rough-In Help charlie902 General Plumbing Help 9 01-26-2012 12:40 AM
Bathroom Drainage Double_DDs General Plumbing Help 1 10-27-2011 11:13 PM
Basement Bathroom Rough-In Picture rhoner General Plumbing Help 8 12-07-2010 11:50 PM
Basement Venting Question kev General Plumbing Help 2 01-20-2010 11:34 PM