Similar to the gas line situation, our old sewer line was cast iron and in a bad location. In accordance with the building standards of the 1950's it was embedded in the concrete slab of the house. In theory the sewer line would be somewhat protected by the concrete that surrounds it. In reality, concrete is very porous to water, so any cast iron pipe in the slab is going to rust. If it starts to leak in your slab, you have to take up whatever flooring you have and jackhammer your slab to expose the pipe. Or you can abandon the old pipe in place and run a new plastic pipe outside the house, which is what we did.
For some unknown reason our sewer lateral (the line going from the house out to the street) was buried very deep. It took a lot of digging to find it. Our plumber, Steve Schwier, and his assistant laid the new line which goes from the kitchen through the future laundry room and across the front of the house to meet the lines coming from the bathrooms. Now the new sewer line is in place and ready to be connected as soon as the inspector okays it.
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