Yes wye fittings for sure. I'll leave the san tees for the vent connection.With current codes, yes.
The fitting off the main to the shower and the lav should by wye or combo fittings. No santees.
Interesting. OK I will check.But the fixture connection order needs to be changed. The lav right now is the downstream most fixture, it needs to be one of the two upstream most. One of the US codes requires the WC to be last, and one of them doesn't, so check your Toronto plumbing code on that.
Cheers, Wayne
If you're referring to the layout in the OP, I'd be very interested to see the reference to the Toronto Plumbing Code that says that two unvented fixture drains can combine before then joining a third dry-vented drain to be wet vented by it. All the codes I'm familiar with would require, at a minimum, that the shower join the 4" line downstream of where the lav joins the 4" line.Verified. Layout is OK.
Best I can find.If you're referring to the layout in the OP, I'd be very interested to see the reference to the Toronto Plumbing Code that says that two unvented fixture drains can combine before then joining a third dry-vented drain to be wet vented by it. All the codes I'm familiar with would require, at a minimum, that the shower join the 4" line downstream of where the lav joins the 4" line.
Cheers, Wayne
Wayne after staring at my sketch and trying to figure things out I'm slowly starting to understand what you are saying. So this leaves me in a predicament. How do I vent the shower?But the fixture connection order needs to be changed. The lav right now is the downstream most fixture, it needs to be one of the two upstream most. One of the US codes requires the WC to be last, and one of them doesn't, so check your Toronto plumbing code on that.
Cheers, Wayne
Certainly messes me up.In “Toilets must be installed downstream of all other fixtures”, I would think they are saying that the toilet must not have a wet-vented shower or tub upstream of it. They are not including the lavatory, which is providing the wet venting, in that reference to fixtures. I think they could have worded that a lot better.
If you want to wet vent the shower, you have to combine the lav and the shower first, then they both join the WC. How deep the is the 4" line? If you have sufficient available depth, the lav/shower can be higher or lower than the WC.So this leaves me in a predicament. How do I vent the shower?
Just looking at the order in which fixtures join each other, i.e. ignoring pipe sizes and lengths, there is no upstream-most fixture. There is just an upstream-most junction, which lets you say what the two upstream most fixtures are. Downstream of that point, if the fixtures join one at a time, there is a well-defined order.
Cheers, Wayne
Looks like I'm euchred. I would need to drill through the 4" to combine them.If you want to wet vent the shower, you have to combine the lav and the shower first, then they both join the WC. How deep the is the 4" line? If you have sufficient available depth, the lav/shower can be higher or lower than the WC.
Cheers, Wayne
If you want to wet vent the shower, you have to combine the lav and the shower first, then they both join the WC. How deep the is the 4" line? If you have sufficient available depth, the lav/shower can be higher or lower than the WC.
Cheers, Wayne
I didnt think that sketch would fly.So this is a basement, with a concrete slab, but the 4" branch is just below the slab, not, say, 6" clear below the slab?
Then you either route the lav drain behind the WC to come hit the shower drain first (the length of the lav drain/wet vent is not limited, while the shower trap arm is limited). Or you dry vent the shower.
To dry vent the shower you need to route the shower drain under or next to a wall in which you can pull off the dry vent vertically and stay vertical. The diagram you posted is no longer allowed as the dry vent can't go horizontal until 6" above the fixture flood rim.
Cheers, Wayne
Yes the 6" rule...So this is a basement, with a concrete slab, but the 4" branch is just below the slab, not, say, 6" clear below the slab?
Then you either route the lav drain behind the WC to come hit the shower drain first (the length of the lav drain/wet vent is not limited, while the shower trap arm is limited). Or you dry vent the shower.
To dry vent the shower you need to route the shower drain under or next to a wall in which you can pull off the dry vent vertically and stay vertical. The diagram you posted is no longer allowed as the dry vent can't go horizontal until 6" above the fixture flood rim.
Cheers, Wayne
This is awkward, but...
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