Rough in Question for shower

[Nilew]

Hello
Building a new bathroom in Toronto. A few questions please:

1. I am using a Schluter Shower Tray and Drain. The video says the shower rough in hole can be up to 5" wide. What is a normal shower rough in? I've seen 3".
Is there a common pipe sizing that is easier/cheaper and more common that will determine the hole size? I guess home depot would have that?

I was going to make the rough in hole 3" but is that the most common piping size?

2. What is the rough in size for the toilet - is it 4"?

3. I checked the building code for water closets, it simply says there should be enough room to move about in the bathroom. For example, it doesn't say a toilet needs 15" of clearance either side, at least that I could find. My shower and vanity will be about 8" away on either side of the toilet.

Thanks

 

[e hilton]

I think you missed the point. They are saying you can have a hole in the floor up to 5” wide, anything larger will not provide sufficient support for the pan. They aren’t talking about the size of the drain pipe.

 

[Nilew]

Ah ok, fair point.
I'll rephrase the questions.
What is the most common drain hose size for
- a shower? 3" or 4"
- a toilet - 4'?
- a wash basin?

I was going to go with:
Shower 3 drain pipe ABS

Toilet 4" drain pipe

Wash basin - 1 1/2 or 2" drain pipe.

Would that be reasonable?
Thanks

 

[e hilton]

Don’t mean to be a smarta$$ … you asked about the most common pipe size … who cares? Size it to suit your local code.

 

[ICE]

In the USA the minimum size is 3” for a toilet, 2” for a shower, 1.25” for the lav. You can certainly go larger but there is a point where the scouring action is impaired. The minimums are common Except the lav which would be 1.5”.

 

[Nilew]

In the USA the minimum size is 3” for a toilet, 2” for a shower, 1.25” for the lav. You can certainly go larger but there is a point where the scouring action is impaired. The minimums are common Except the lav which would be 1.5”.

Thank you. That helps. I think the codes here are the same.
I looked at home depot and they only carry 1.5, 2 and 3 inch pipe so it follows what you're saying.

 

[fatboy]

To point out the obvious, check in with the local AHJ (Authority Having Jurisdiction) on these questions, assuming you are pulling the necessary permits.