Bathroom addition (New construction) - Toilet vent

Users who are viewing this thread

cyrus-the-virus

New Member
Messages
11
Reaction score
0
Points
0
I have added an addition onto the side of my house. The problem I am wrestling with is how to layout the waste/vent line for the toilet, sink and bathtub. I am located in New Jersey and the wall at the back of the toilet is a load bearing wall. The joists below are 12" TGI's 16" O/C. The walls are all framed in 2x4s.

The wall behind the toilet and the wall to the right of the toilet are exterior walls.

As you can see from the diagram, I would like to vent horizontally from the right side of the toilet and up the stud wall, but I am not sure I have enough space for the necessary 90 degrees to get up the stud wall (15"). The vents will then meet in the attic space as a 3" vent up through the roof.

After I get your advice, I will layout the components and provide another picture.
 

Attachments

  • Vent_Plan.jpg
    Vent_Plan.jpg
    71.4 KB · Views: 6,243

Basement_Lurker

One who lurks
Messages
664
Reaction score
1
Points
0
Location
Victoria, BC
I don't follow you when you say that you don't have enough space for the necessary 90 degrees to get up the stud wall. Can you explain this a bit better?
15" seems like a lot of room to work with.
 

Redwood

Master Plumber
Messages
7,335
Reaction score
13
Points
0
Location
Connecticut
It looks like you are planning a heel elbow venying of the toilet.
Don't go there!

Wet vent it with the lav sink & vent the tub.

You can only use the lo heel tee with the vent pointing up
attachment.php
 
Last edited by a moderator:

cyrus-the-virus

New Member
Messages
11
Reaction score
0
Points
0
I went and picked-up several peices last night and then took some photos of the space. After gathering supplies I agree with you and believe the 15" is plenty of room. I have proposed two options.

How would I wet vent? Are there any drawbacks?
 

Attachments

  • Option_1.jpg
    Option_1.jpg
    23.8 KB · Views: 3,244
  • Option_2.jpg
    Option_2.jpg
    23.2 KB · Views: 3,111
  • 1_Floor.jpg
    1_Floor.jpg
    33.7 KB · Views: 2,850

loafer

Mechanical Engineer
Messages
50
Reaction score
0
Points
6
Location
Maine
Doesn't the vent end of the low heal 90 have to be vertical?
 

hj

Master Plumber
Messages
33,600
Reaction score
1,037
Points
113
Location
Cave Creek, Arizona
Website
www.terrylove.com
vent

You probably will not be allowed to use that heel inlet quarter bend for the vent and even if you could, you shouldn't. There are many ways to do it correctly, but we do not have enough information as to how the pipes can be run below the floor, which will affect which is the better pipe arrangement.

attachment.php
 
Last edited by a moderator:

cyrus-the-virus

New Member
Messages
11
Reaction score
0
Points
0
I would be glad to provide any additional information. What additional information is needed?
 

Terry

The Plumbing Wizard
Staff member
Messages
29,946
Reaction score
3,460
Points
113
Location
Bothell, Washington
Website
terrylove.com
attachment.php

If you use a low heel tee like in your picture, it has to be treated as a santee fitting. That means the vent would be on top, the inlet would be on the side. Santees are mounted vertically.

If you want to run your piping horizontally, then you would use a wye fitting. A wye could be a 3x2, with the 2" part of it rolled upward to keep it above the flow level of the waste line.
 
Last edited:

adb

New Member
Messages
30
Reaction score
0
Points
0
If you want to run your piping horizontally, then you would use a wye fitting. A wye could be a 3x2, with the 2" part of it rolled upward to keep it above the flow level of the waste line.

It looks from the pictures like this would probably all tuck nicely into one joist bay and work rather elegantly.

One quick word of warning, though--if anything does have to pass through the joists, check the manufacturer's tables (looks like you have TJI-I think Weyerhauser makes the tables available online) for proper hole placement, since this bathroom is right over the bearing end. You have to stay a certain distance from the end with any penetrations to avoid compromising the structural integrity of the joist. The distance is a function of hole size (relative to joist height) and joist span.

Props to the OP for the visio diagram and photos.
 

cyrus-the-virus

New Member
Messages
11
Reaction score
0
Points
0
Options again - Take 2

Okay so I took all of the above advice last night, purchased some more connections and again have two options. The first option would have two vents, one from the w.c. and another from the lav. They would join together before going up into the attic.

The other option uses a wet vent. (Are wet vents allowed in NJ?) I still have to turn to go up the middle stud bay because of wiring/medicine cabinet/etc.

I have also included a picture of the tub drain. I do not believe there are any concerns here, but I figured I would post it. To connect this into the 3" drain should I use a Tee or a Wye?

Thanks for the note on the TGIs. I had already gotten the specs on the holes and holes sizes and I adjusted the plan slightly to accomidate them. But if someone else uses this thread as a reference here is a link to my specific joists. (http://www.bc.com/wood/ewp/guides-resources/guides/Eastern-Southern-US/Eastern-BCI---VERSA-LAM-series.html)
 

Attachments

  • Option_1_take2.jpg
    Option_1_take2.jpg
    26.4 KB · Views: 2,768
  • Option_2_take2.jpg
    Option_2_take2.jpg
    26 KB · Views: 2,874
  • tub.jpg
    tub.jpg
    26.5 KB · Views: 2,737

Redwood

Master Plumber
Messages
7,335
Reaction score
13
Points
0
Location
Connecticut
Option 1 shows an incorrect usage of a sani-tee on the lav sink drain.
Option 2 is what I would go with. How it is done though is key to whether it is correct or not. Check with your local inspector to determine if wet venting is allowed.
 

cyrus-the-virus

New Member
Messages
11
Reaction score
0
Points
0
I just spoke with the plumbing inspector and a wet vent is allowed. As for the sani-tee I am not sure where the problem is beacuse the sani-tee is used in both areas. (Other than the fact that it is upside-down.) I have shown a close up image of the lav drain/vent in both situations.

I would be coming off the front of the sani-tee into a P-Trap. Is it best to have the front of the P-trap be threaded or non-threaded (glue type)?
 

Attachments

  • Option_1_take2_close.jpg
    Option_1_take2_close.jpg
    15.1 KB · Views: 2,726
  • Option_2_take2_close.jpg
    Option_2_take2_close.jpg
    15.1 KB · Views: 2,680

Redwood

Master Plumber
Messages
7,335
Reaction score
13
Points
0
Location
Connecticut
In option 1 you were using a sani-tee horizontally to tie into the line from the toilet. That is not allowed! a wye and 45 el or, a combo should be used.
 

cyrus-the-virus

New Member
Messages
11
Reaction score
0
Points
0
Thanks for the clarification it looks like option two is the way to go. The first 90 of the vent will be at least 6" above the flood level of the lav. Are there any restrictions on the number of 90 degree turns on the vent? (I have to turn to move into the next stud bay and then turn go up into the attic and then up through the roof)
 

Redwood

Master Plumber
Messages
7,335
Reaction score
13
Points
0
Location
Connecticut
Make sure that 6" above flood level on the sink is okay with your inspector. Vents must maintain pitch just like a drain.
 

hj

Master Plumber
Messages
33,600
Reaction score
1,037
Points
113
Location
Cave Creek, Arizona
Website
www.terrylove.com
drain

One thing that would be nice to know is what is the downstairs? Is it going to be finished? If it would work, I would put the 3" vertical pipe behind the lavatory, with a 3" sanitary tee in, or below, the TGI's and either rotate the inlet towards the toilet or 90 out of it over to the toilet. The the lavatory, and possibly a cleanout would connect directly into the 3"
 

cyrus-the-virus

New Member
Messages
11
Reaction score
0
Points
0
Sorry I did not add that earlier. The space below is a finished garage space. I would like to avoid dropping below the bottom plate of the TGI.
 

cyrus-the-virus

New Member
Messages
11
Reaction score
0
Points
0
TGI in way of Tub

Okay so I well on my way to my first full installation of a plumbing system for my addition. I received my tub last night and ran into a problem. The TGI joist runs just to the side of the drain. I looked at it and I just do not have enough room to make the connections. I am sure someone has had a similar problem before. Suggestions?

Thanks
 

Attachments

  • TGI_1.jpg
    TGI_1.jpg
    53.3 KB · Views: 1,431
  • TGI_2.jpg
    TGI_2.jpg
    39.3 KB · Views: 1,462
  • TGI_Overall.jpg
    TGI_Overall.jpg
    49.2 KB · Views: 1,547
Top
Hey, wait a minute.

This is awkward, but...

It looks like you're using an ad blocker. We get it, but (1) terrylove.com can't live without ads, and (2) ad blockers can cause issues with videos and comments. If you'd like to support the site, please allow ads.

If any particular ad is your REASON for blocking ads, please let us know. We might be able to do something about it. Thanks.
I've Disabled AdBlock    No Thanks