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Old 03-04-2012, 08:31 PM   #1
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Basement bathroom/shower drain/venting question


Hello,

I am working on the basement bathroom and wanted to double check a few things. I have a roughed in vent that runs to the roof, would it be possible for me to connect both the sink and the shower to this vent? Below is a diagram of what I am looking to do, please let me know if you see anything off. Thanks!



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Old 03-04-2012, 11:33 PM   #2
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Basement bathroom/shower drain/venting question


Do you have any measurements you could add to your diagram? Looks like you want to wet vent the whole bathroom group and you'll need to be careful of the distances. Are you allowed to wet vent where you are? Which code are you under?

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Old 03-05-2012, 12:22 AM   #3
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Basement bathroom/shower drain/venting question


Hello,

There us about 6 feet from each drain to the vent. This vent isn't also being used as a drain however, it will just be venting the sink and shower so I don't believe it would be considered a wet vent in this case. The vent lines I diagrammed in the picture are actually about ground, going through the walls, I should of said that originally. I just wanted to add them to show the direction I want to run the vents.

Below is a picture of the sink drain, I was planning on running the vent out of the top of that pipe and the "T" on the left would be connected to the drain itself. I then wanted to add a "WYE" to the shower drain pipe and basically do the same, and then connect both to the vent pipe that I have in the corner running directly to the roof. Do you see anything wrong with that?



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Old 03-05-2012, 08:44 PM   #4
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Basement bathroom/shower drain/venting question


how far over from the t is the sink going to be and the pipe you are connecting sink to could be called a wet vent if it is being used to venting toilet
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Old 03-06-2012, 03:19 PM   #5
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Basement bathroom/shower drain/venting question


Hello,

The sink is going to be about 2 feet away. I am going to also run a line through the wall from my shower and vent it as well separately I think.

Is it fine for me to connect to the toilet line after the sink, "WYE" in for my shower and then about a foot from the shower drain run a T off that to vent the shower?
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Old 03-06-2012, 05:58 PM   #6
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Basement bathroom/shower drain/venting question


Maybe this one will show a bit better, all I really want to do is connect off of the toilet drain line after the toilet, run the shower drain line and T off the shower drain line for a vent, do you see any problems with this?

Thanks again!



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Old 03-07-2012, 07:52 PM   #7
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Basement bathroom/shower drain/venting question


Hello,

Just ran the shower drain (haven't glued anything yet) and the vent line is off to the right which I still have to run up to the pipe in the ceiling the builder put in and capped off for me to use as a vent. Just wanted to run this by you to see if you noticed anything that you would suggest I change? Are the elbows in the vent line fine like that?

Thanks again!



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Old 03-07-2012, 10:51 PM   #8
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Basement bathroom/shower drain/venting question


Also I have the vent line on a bit more of a slope then the drain line
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Old 03-08-2012, 11:18 AM   #9
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Basement bathroom/shower drain/venting question


Anyone got any opinions/suggestions on this?

Thanks
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Old 03-08-2012, 11:35 AM   #10
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Basement bathroom/shower drain/venting question


Quote:
Originally Posted by tucker16 View Post
Anyone got any opinions/suggestions on this?

Thanks
Is that a shower or toilet?
If shower, run it in 2", install a ptrap- not a 90
Must use a wye for the vent connection, not a tee
Use 45's instead of 90's on the vent
Vent come off the drain above the center line of drain pipe. that way air can still enter or leave the drain when in use (simplified explanation)
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Old 03-08-2012, 11:47 AM   #11
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Basement bathroom/shower drain/venting question


Quote:
Originally Posted by TheEplumber View Post
Is that a shower or toilet?
If shower, run it in 2", install a ptrap- not a 90
Must use a wye for the vent connection, not a tee
Use 45's instead of 90's on the vent
Vent come off the drain above the center line of drain pipe. that way air can still enter or leave the drain when in use (simplified explanation)
Hello

It's a shower, right now it's a 2" with a p trap as well. Everything else good? Basically swap out the T for a WYE and the 90's for 45's?
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Old 03-08-2012, 11:53 AM   #12
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Basement bathroom/shower drain/venting question


Sorry just wanted to clarify a bit, I do have a WYE there for the vent, so do you suggest I just swap those 90's out for 45's?
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Old 03-08-2012, 12:04 PM   #13
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Basement bathroom/shower drain/venting question


Quote:
Originally Posted by tucker16 View Post
Hello

It's a shower, right now it's a 2" with a p trap as well. Everything else good? Basically swap out the T for a WYE and the 90's for 45's?
My bad, couldn't really tell from the picture.
The vent branch of the wye needs to be at about a 45 degree angle to the shower pipe (roll it up above the center line of the 2"). This is a must to make the flat vent work properly. The vent needs to enter the top half of the drain to break the siphon on the ptrap. Keep a minimum 1/4" per ft grade on the vent.
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Old 03-08-2012, 12:13 PM   #14
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Basement bathroom/shower drain/venting question


Awesome advice, thanks!

So say my drain pipe was 30" long, should I put the WYE about 10" before the P trap?
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Old 03-08-2012, 12:39 PM   #15
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Basement bathroom/shower drain/venting question


Quote:
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Awesome advice, thanks!

So say my drain pipe was 30" long, should I put the WYE about 10" before the P trap?
UPC allows up to 5 ft on a 2" trap arm. Personally, I'd go more then 10" so you have room to do your fitting.

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