DWV for new bathroom questions

dlink

dlink

New Member
Messages
41
Reaction score
0
Points
0
I am building a brand new bathroom and had a questions regarding the DWV runs. As shown in the pic I have a double sink on one side of the bathroom and a whirlpool tub and seperate shower on the opposite side. I am woundering if I can run a 2" horizontal drain between both fixture and connect all the fixtures to it. The 2" line would then connect into a vertical 3" main drain.
Note the shower would be plumbed with 2", the double sinks 1 1/2 and tie into 1 drain via a 4 way tee with a vertical line going up for the vent and a line going down to connect into the 2" line between all fixtures. The tub would be plumbed 1 1/2.

Please refer to pic

Or does the shower, whirlpool tub and sinks need to connect into the 3" main drain by means of their own run into a wye on the 3' line?
 

Attachments

  • bathroom plumbing.jpg
    bathroom plumbing.jpg
    19.9 KB · Views: 991
drawing

I know which way the drawing shows. Rather than try to give a direction, I am saying everything "below" the horizontal line is incorrect, and it will still be after you install it in the ground or wherever it goes. AND you cannot use the "4 way" tee for the sinks either. There is a specific fitting for that purpose.
 
hj said:
I know which way the drawing shows. Rather than try to give a direction, I am saying everything "below" the horizontal line is incorrect, and it will still be after you install it in the ground or wherever it goes. AND you cannot use the "4 way" tee for the sinks either. There is a specific fitting for that purpose.
Click to expand...

What do you mean by "everything "below" the horizontal line is incorrect, and it will still be after you install it in the ground or wherever it goes"

and for the sink what is this special fitting required

thank you

The double lav needs a 2.0"x1.5"x1.5x1.5 double fixture fitting.
You can't combine two lavs into a 1.5 riser. It needs to be 2"
Click to expand...

lav_rough_double_b.jpg
 

Attachments

  • bathroom3.jpg
    bathroom3.jpg
    63.6 KB · Views: 912
  • bathroom4.jpg
    bathroom4.jpg
    33.4 KB · Views: 930
Last edited by a moderator:
dlink said:
What do you mean by "everything "below" the horizontal line is incorrect, and it will still be after you install it in the ground or wherever it goes"

and for the sink what is this special fitting required

thank you
Click to expand...

any comments on this this would be appreciated
 
Excuse the freehand drawing, hope this helps

esplumbing-378252-albums-misc-shots-pic24379-02-22-2009-09-09-17am.jpg



I would keep the main waste line 3" but thats my opinion, 2" would work also, but you are getting close to the maximum allowed fixtures units on a 2" There is a saying down in my neck of the woods that you cannot dump a 2" over a 2" so thats why we run 3", and I know someone will chime in and say the tub and lavs are 1 1/2" but that is not how they look it at, just an fyi if you are ever down my way.
 
drains

Now that you have a picture, in this area at least, the piping to the right, i.e., to the shower and tub would not pass without additional venting. The proper fitting is a "back to back fixture fitting", and it also needs/should have a cleanout tee in the vertical pipe beneath it. Plumbing codes are a "minimum requirement" and are not always the BEST installation although it may be an adequate one.
 
in the atached pic the area's with read circles, since the 3" main and lines from each ficture are running horizontal do I use a or a say 3x3x2 sanitory tee?
 

Attachments

  • Untitled.jpg
    Untitled.jpg
    16.8 KB · Views: 894
first of all thank you for your help.

and yes I understand that I need to vent the tub and shower seperatly. In my picture it showes the tub and where the shower will be and it shows the drain lines with p traps running from to let say the 3" horizontal drain as suggested. Where or how would I ven this 2 fixtures. I have a wall to the left of the shower and tub.

thank you
 

Attachments

  • DSCN9929.jpg
    DSCN9929.jpg
    50.5 KB · Views: 978
dlink said:
in the atached pic the area's with read circles, since the 3" main and lines from each ficture are running horizontal do I use a or a say 3x3x2 sanitory tee?
Click to expand...

3"x2" combo (wye and 1/8 bend)

The one vent is enough and it is how its done here in the southeast, but I know that a lot of places make you vent individually.
 
Last edited:
again thank you for the help....

and yes I understand that I need to vent the tub and shower seperatly. In my picture it showes the tub and where the shower will be and it shows the drain lines with p traps running from to let say the 3" horizontal drain as suggested. Where or how would I vent these 2 fixtures. I have a wall to the left of the shower and tub.

thank you
 

Attachments

  • DSCN9929.jpg
    DSCN9929.jpg
    50.5 KB · Views: 918
anyone have any suggestions on how to runn the drains for the shower and tub as shown in the pic in my prevoius post. I have drawn out the drain line runs.

thanks
 
I appreciate your assistance. But yes I need the tub and shower to each have their own vent when they leave and of course they can connect together once in the attic.

Also as I have shown in the of above, how do I vent each fixture when it comes to the tub and shower I understand that they cannot travel horizontal until they have ran at least 6" verticaly above the fixture which it is venting, I think that correct??
 
Last edited:
I think that will work, I will check it out and let you know. And again I really apprecite the help.

PS I take it this will pass code?
 
Worried about code and already have the walls tore open and pipe ran¿ lol More appropriate question should be will your work pass inspection. Hope those pipes are dry fit as it seems there is a lack of primer... :rolleyes:
 
kingsotall said:
Worried about code and already have the walls tore open and pipe ran¿ lol More appropriate question should be will your work pass inspection. Hope those pipes are dry fit as it seems there is a lack of primer... :rolleyes:
Click to expand...

yes dry fit right now
 
You must log in or register to reply here.

Similar threads

T
Fixing PO’s DIY Masterpiece - Bathroom Remodel Venting and Trap Questions
Replies
1
Views
509
T_N
T
M
Three questions about Bathroom DWV plumbing...
Replies
8
Views
18K
MG70
M
E
Should my wet vent wye's be horizontal or rolled up?
Replies
3
Views
532
wwhitney
wwhitney
Sephy
Main stack questions
Replies
2
Views
6K
Reach4
Reach4
J
Need HELP with Draining plumbing challenge
Replies
1
Views
398
Jeff H Young
Jeff H Young
Back
Top