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Stuck Main Shut-Off Valves: Penetrating Oil and Patience

Two flat metal valves bolted to pipe, stuck. Need trick to turn on.

Careful Approach

"Stuck valves have to be treated very carefully. Try using some penetrating oil like WD-40 on them and let it soak in for a good long while. Then slowly work the valve back and forth, not really trying to force it. It may take some time to loosen up the valves, so be patient."

Forcing stuck gate/ball valves cracks bodies or snaps stems. Penetrating oil + time + gentle oscillation is the only safe method.

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