darren_t_johnson
New Member
Hi,
I'm currently redoing a lot of the plumbing in my basement... Its a home built in 1960, in Ottawa, Canada. I'm adding two bathrooms. There are two floor drains in my basement. One 2" drain near all the old laundry fixtures. Its a normal drain (2" drain with a trap and a trap arm that joins up with the main waste pipe).
And then there is the other drain. It is near the main clean-out for my 4" waste pipe. At first I thought it was a normal 3" floor drain with a trap and that it connects to the main waste pipe. It does that, but it does more. If you look at the pics, you'll see a Tee off the drain just above the trap. The tee is not connect to any thing. It is just an open hole into the drainage gravel under my slab.
When I had a plumber in (before I has this section of floor broken up) he thought maybe this might be where my external drain tile along the footings tied in. He said that is "possible" in an older home that the drain tile around the footings might be tied into my main waste pipe before it ties into the city line.
so what do you guys think? Is this a normal or common thing? Is it something that was done in older homes? Is it there to provide "under slab" drainage?
Thanks!
I'm currently redoing a lot of the plumbing in my basement... Its a home built in 1960, in Ottawa, Canada. I'm adding two bathrooms. There are two floor drains in my basement. One 2" drain near all the old laundry fixtures. Its a normal drain (2" drain with a trap and a trap arm that joins up with the main waste pipe).
And then there is the other drain. It is near the main clean-out for my 4" waste pipe. At first I thought it was a normal 3" floor drain with a trap and that it connects to the main waste pipe. It does that, but it does more. If you look at the pics, you'll see a Tee off the drain just above the trap. The tee is not connect to any thing. It is just an open hole into the drainage gravel under my slab.
When I had a plumber in (before I has this section of floor broken up) he thought maybe this might be where my external drain tile along the footings tied in. He said that is "possible" in an older home that the drain tile around the footings might be tied into my main waste pipe before it ties into the city line.
so what do you guys think? Is this a normal or common thing? Is it something that was done in older homes? Is it there to provide "under slab" drainage?
Thanks!