Learn how to install a central vacuum system with outlets on four floors and hidden PVC piping.
Trim the top of the pipe if necessary and add a PVC fitting to make the transition from vertical pipe to horizontal pipe. The horizontal runs from the outlets pass through holes in the joists in the attic floor and return to an intersection at the laundry chute. From that point, they join the main PVC run down the laundry chute to the basement.
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