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Old 08-20-2012, 07:16 PM   #1
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Draining/Venting Tips Needed


Hello everybody,

Your input and feedback on this is very welcome.

I am combining what used to be side by side bathroom and laundry rooms in my basement into one larger room and of course this necessitates moving plumbing.

The previous plumbing all seemed to be draining just fine.

Please see the attached photos for a reference:




My main areas of concern are as follows:
  • The existing dry vent that I am tying into is 2". I presume given teh fact that there were no past problems that this is sufficient for this bath/laundry group
  • Given that the shower is now downstream from the toilet will this be an issue with venting? They will both use the sink's wet vent
  • Do all of my tie ins to the main horizontal line (shower, toilet, sink) need to be Y-shaped?
  • As you can see the two vents will tie in at the ceiling below the joists. Is the way I have it drawn out OK? Ideally I would run the line straight to both areas but you can see some stuff gets in the way so I have to make that awkward shape. This vent ties into the stack that vents the kitchen. The kitchen sink does not drain through this stack.

Please let me know if anything is unclear about my drawings.

Am I on the right path here?


Last edited by illusion8055; 08-20-2012 at 09:56 PM.
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Old 08-20-2012, 07:17 PM   #2
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Draining/Venting Tips Needed


Sorry that the pics were so large...

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Old 08-20-2012, 08:45 PM   #3
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Quote:
Originally Posted by illusion8055 View Post
Sorry that the pics were so large...
can you make them smaller?
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Old 08-20-2012, 09:56 PM   #4
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Draining/Venting Tips Needed


Done!
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Old 08-20-2012, 10:24 PM   #5
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Draining/Venting Tips Needed


In my neck of the woods, very little of the either piping layouts would pass code.
The shower,lav and toilet are not vented per UPC standards.
The only thing I see plumbed properly is the washer-it's vented
And yes you must use wyes on horizontal drain connections
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Old 08-20-2012, 10:28 PM   #6
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Draining/Venting Tips Needed


Do u have any recommendations?
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Old 08-20-2012, 10:39 PM   #7
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Give us a location so we can get an idea of which code you're under.

Quote:
Given that the shower is now downstream from the toilet will this be an issue with venting?
Up here wet venting is done quite often. The problem draining the shower before the toilet, is that if there's a back-up on that horizontal line, you could have sh*t back-up into your shower.
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Old 08-20-2012, 10:44 PM   #8
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Give us a location so we can get an idea of which code you're under.



Up here wet venting is done quite often. The problem draining the shower before the toilet, is that if there's a back-up on that horizontal line, you could have sh*t back-up into your shower.
Would you pipe the lav like that?
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Old 08-21-2012, 03:45 AM   #9
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Draining/Venting Tips Needed


I'm in Montreal, Quebec, Canada. Kirkland to be exact.
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Old 08-21-2012, 01:38 PM   #10
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Draining/Venting Tips Needed


My mistake, it's a 1.5" vent that I'm tying into... will that need an upgrade?
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Old 08-21-2012, 10:52 PM   #11
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Would you pipe the lav like that?
Nope.
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Old 08-21-2012, 11:16 PM   #12
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Nope.
Didn't think you would
While I can't vent as shown on some of the other fixtures- that lav is wrong by all codes
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Old 08-22-2012, 01:49 PM   #13
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Draining/Venting Tips Needed


My main line is 4". I double checked.

So I Photoshopped up some shots to further clarify things, and also illustrate tying into the 4" main AFTER the bath group.




Is there a minimum distance to maintain between tying the laundry into the main drain and the wye for the shower?

What is wrong with my proposed 2" lav drain? Could you clarify? I plan to tie it in to the main drain via a wye. It will of course be trapped. It will also serve as a wet vent for the shower and toilet.

The upstairs kitchen/dishwasher have their own vent and the washing machine would have its own vent leading to the main bathroom vent.
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Old 08-22-2012, 08:07 PM   #14
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Draining/Venting Tips Needed


Id try to keep the washer tied in atleast 5' ahead of any other fixture to avoid issues with soap suds,then run a full 2" vent from it.
Why do you have a 2" vent drawn for sink?
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Old 08-22-2012, 08:37 PM   #15
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Thanks for the great feedback Plummen.

I have the 2" wet vent for the sink to serve as the vent for the bath group (shower/lav/wc). Is that wrong?

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