How to vent a relocated plumbing sink or drain
Moving a sink or bathroom fixture requires connecting to a main stack and navigating strict building codes that dictate where pipes can be routed. When constraints like exterior walls or existing basement layouts prevent standard connections, homeowners get stuck unable to safely move their plumbing.
What people tried
Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.
- 1Using a cheater vent instead of running a traditional vent stack
- 2Rerouting lines through interior walls
- 3Reaching out to local plumbers for professional bids and advice
- 4Cutting up the concrete slab and repiping underground
In their words
Unedited, grouped by where they were said, most upvoted first within each place, each linked to the thread it came from.
“Ideally we would also shift this main stack over to either be encased in a future wall, or at least much closer to the wall to open up the bathroom more.”source ↗
“Being that this is jn the basement and the main drain for the 2 bathrooms above it, I'm not sure if code allows this to be moved”source ↗
“Not sure how else I can move this sink”source ↗
Where this came up
People with this problem also raised
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- 3How to route vanity plumbing to fit drawers
- 2How to install a vanity over floor pipes in a tight space
- 4Can I replace a rental laundry tub to install a dishwasher?