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We're building a half-bath in our basement. I have done a decent amount
of plumbing projects, but have never worked on a sewage line.
As luck would have it (one of the very few lucky things that have
happened with this house since we bought it), one cast iron vent stack
runs right through the area where the toilet will go. We've already
broken up the floor to expose the sewer line. Unfortunately I will have
to go a couple of feet farther underneath the slab in order to expose a
length of pipe that doesn't have a wye on it.
My question is: Can I just cut the horizontal cast iron pipe under the
floor and insert a 4" PVC wye using banded couplings? Will this be
reliable, buried under soil and then covered over with 4" of concrete?
Do I've to worry about the rubber rotting (the soil has probably not
seen water since 1952 when the house was built)? And will breaking open
the horizontal pipe cause raw sewage to spill all over the place? Or,
assuming a proper slope, does it all drain into the sewer system?
Please respond in the NG.
Thanks,
Steve
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Installing a toilet in the basement
