How to get off a sink locknut put on upside down
Standard basin wrenches cannot grip the reversed notches of a sink locknut installed upside down, making it nearly impossible to loosen. This prevents homeowners from removing the nut to fix a loose seal or correct the installation.
What people tried
Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.
- 1buying specialized basin wrench tools
- 2Holding the bottom nut with a wrench while using another wrench to turn the top insert counterclockwise
- 3Using a longer wrench for more leverage
In their words
Unedited, grouped by where they were said, most upvoted first within each place, each linked to the thread it came from.
“Today, I realized I accident put on the locknut underneath the sink upside down, meaning the seal isn’t as tight as it should be. Now here’s my real problem. I can’t get it loose to flip it right side up. I went and bought one of those tools that’s specifically for loosing and tightening it, but because it’s upside down, I can’t get the tool around the notches.”source ↗