How to run drain lines without tearing out the wall
Connecting lines in tight spaces forces people to piece together small sections or worry about squished hookups just to avoid ripping out finished walls. Using rigid materials makes reaching behind appliances difficult, leaving homeowners stuck between cramped connections and adding wall teardowns to their rebuild.
What people tried
Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.
- 1Piecing together short sections of pipe through existing holes
- 2Tearing out drywall and structural framing to drop in longer runs
- 3Dry fitting PVC and trying to adjust slopes or angles
- 4Using a softer, flexible foil hose instead of rigid aluminum.
- 5Leaving the flexible hose as-is rather than replacing it to avoid having to maneuver behind the machine.
In their words
Unedited, grouped by where they were said, most upvoted first within each place, each linked to the thread it came from.
r/Plumbing1 person · September 2026
r/hvacadvice1 person · October 2026
Where this came up
People with this problem also raised
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- 3How to route roof drainage without underground pipes
- 3How to keep a drain hose from popping out of a PVC pipe