Where there is a sink in the cellar, the soil pipe should be below the cellar floor.
The joints of the waste and soil pipe should be lead calked.
The soil pipe is the vertical pipe or pipes receiving sewage matter from the water-closets in the house.
There is generally a piece of lead connecting the toilet with the soil pipe.
The branch waste pipe should be trapped and connected with the main waste or soil pipe.
It must also be remembered it is every whit as dangerous if these waste conduits lead into the soil pipe of a closet.
Sometimes the vent, instead of running above the roof, is connected with the soil pipe several feet above all fixtures.
When the soil pipe from a water-closet is exposed in cold weather it may freeze up or be clogged by urinary deposits.
The soil pipe is of cast-iron, and usually four inches in diameter on the inside.
The soil pipe is ventilated by continuing up through and well above the roof with a full opening at the top.