How to remove a snapped valve adjustment screw
A valve adjustment screw can snap off right under the nut with only slight pressure. The remaining bolt often backs out a few threads before stopping completely and refusing to budge, even when twisted with vice grip pliers.
What the numbers show
Counted from the threads quoted below. How we count
- The most recent one is from October 2026.
- This comes up 15.1× more often in r/Plumbing than across the site as a whole.
What people tried
Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.
Found another way around this?
Share your steps and trade-offs so fellow engineers don't have to reinvent the wheel. No account required.
- 1Trying to twist the stuck bolt out using vice grip pliersDid this help you?
- 2Welding a nut to the remaining thread to wrench it outDid this help you?
- 3Using a chisel to turn the broken boltDid this help you?
- 4Pulling the cam bridge and replacing the rocker armDid this help you?
- 5Chipping out the surrounding grout or concrete to access the valve stem and retaining nut.Did this help you?
- 6Apply penetrating oil and gentle back and forth wigglingDid this help you?
- 7Adjust or loosen the packing nut lower on the valveDid this help you?
- 8Applying penetrating fluid, soaking, supporting the pipe, and spinning the valve offDid this help you?
- 9Backing up the pipe to prevent twisting or damageDid this help you?
- 10Cutting the bib side of the valve and spinning it off with the copper backed upDid this help you?
In their words
Unedited, grouped by where they were said, most upvoted first within each place, each linked to the thread it came from.
“Looks like someone cemented the shower handle thing? We're trying to take it out to replace it to resolve a leak.”source ↗
“I'm trying to remove the valve stem by rotating the upper handle counter-clockwise but it locks up in this position.”source ↗
“What are the chances that id be able to remove this valve without damaging the copper threads?”source ↗
Where this came up
People with this problem also raised
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- 12How to get off a stripped or over-tightened oil drain plug
- 16How to remove a faucet handle with no visible screws
- 12Stuck differential cross pin bolt won't come out