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NOTE: This is an unformatted excerpt from our online fire protection training library.

Automatic Sprinkler Inspection, Testing & Maintenance

difficult to turn

Rarely is there a problem with the valve itself that causes the valve to be difficult to turn. Most problems with a hard turning valve are due to other problems. Poor lubrication is a primary reason. Failing to follow the required maintenance schedule will cause the valve to turn hard.

Post indicator valves are often difficult to turn. Just as often, the problem is within the post indicator itself, not in the valve. The interior of a post indicator contains fine brass threads. When dirt, rust, grit, and other debris accumulates in these threads, it makes the valve difficult to turn. These threads should be inspected, cleaned, and lubricated. The second major reason for a hard turning post indicator valve is that the shaft running from the post indicator down to the underground valve is not properly aligned with the valve. If this shaft is not vertically aligned it will cause the shaft to bind making it difficult to operate the valve. The only solution to this problem is to dig the valve up, and realign the post indicator on the valve.
NOTE: This is an unformatted excerpt from our online fire protection training library.

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