Bathroom Renovation Plan Question

[James Stang]

Hello,

I've been lurking on the forums, reading and trying to absorb as much knowledge as I can.

I'm wondering if anyone out there can tell me if my plan for the situation I'm facing in my bathroom remodel is correct, or if you have suggestions for how to do it better, or different fittings to use.

I've included pictures of the current alignment - which has been working with no issues, despite only using a single vent for 3 fixtures (the main stack).

I'm remodeling the main floor bathroom - a 3/4 bathroom (sink, toilet and stand up shower). We do have another full bathroom upstairs, but that is all. This is also the bathroom guests use and see, so I'm hoping to update it to current standards and have it be quite nice. I have purchased an in wall toilet (Geberit frame and Duravit Toilet) and I'm looking to increase the shower from a 34" x 34" to a 48" x 34". This will solve space issues as well as the bathroom being pretty tight.

Now to the current layout.


The main vertical stack goes up to nearly the roof and then turns immediately out to the single floor attic space and then turns up and vents out the roof. There are no other fixtures using this stack to drain above. (The house is a 1 and a half story - so half the house is only 1 story).

The sink and toilet are on one wall and the shower directly across from the toilet. The sink drains straight sideways to the main stack and also vents that way. The washer vent also comes across the basement (6 feet) and then up and vents into the main stack. (You can see beside the toilet)


Below in the basement - you can see the main stack (with cleanout) comes up and angles over and then up again. From that point on, the toilet drains into the stack (no other vent and uses a Y). The shower then runs across (6 feet) and drains into the main stack above the toilet connection (no other vent and uses a Y).

Then above the floor, you already know about the sink drain and washer vent.

See my reply below for the plan, as I have updated it (January 2nd).

Thanks,

James

 

[James Stang]

If you read it before, I have altered the plan a bit to hopefully correct a problem with the venting. (See below).


Here goes my plan:

Disclaimer: I'm aware of proper slope (although my drawing skills may not represent this haha).

1) I will add a vent about 2 feet from the sink that runs up and connects to a new washer vent that join up and connects to the main stack above, adding a clear vent for the sink and replacing the lost washer vent.

2) I will then realign the main stack (bottom to top):
-Two 3" - 45 degree bends to get the stack running up and down sooner (it currently takes about 3 feet to do this).
-One 3" expansion joint (required by code)
-One 3" - 3" - 3" San-T - for toilet drain - Will this wet venting be adequate or should I be adding a separate vent? It is only a 3 foot drop and 2 foot horizontal run to the main stack.
-One 3" - 3" - 1 1/2" Y for sink drain - Should this be a San-T or is a Y better since it is already vented separately?
-One 3" - 3" - 2" San-T - for shower drain - as the top drain fitting, and wet venting being allowed in Canada, are there any other concerns functionally? It is 6 feet away exactly.

I added my questions and concerns in Red above.

-I'm wondering about the benefits of adding a toilet vent off the left side of the first drop. So... would you add a 3" - 3" - 2" Wye before the 45 degree bend and vent it up and over to the main stack below the sink vent?

Thanks to anyone who can take the time to get back to me.

Thanks in advance,

James

 

[Sponsor]

 

[Terry]

The shower can wet vent over the toilet, using a santee there on the vertical.
The lav looks to be vented in your drawing. I like to use a long turn 90 where it goes from vertical to horizontal on it's way to the 3".

 

[James Stang]

Thanks Terry, no other issues from what you can see in the drawing then?

I really appreciate the feedback!

 

[Terry]

It works for me.

 

[James Stang]

Thank you very much for your time Terry!