Definition of soil stack in English:

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soil stack

noun

The pipe that takes all the waste water from the upstairs plumbing system of a building.
Example sentences
  • If after taking the above steps the sluggish performance persists, you may have an obstruction in the vent pipe that exits through your roof or somewhere in the soil stack.
  • In the space at the back of our stairs we found a small room, a small room that contained the soil stack, into which the offending waste pipe terminated.
  • The soil stack will dictate the position of the toilet.
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