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Product Description Sun offers an optional adjustment Key Lock Cover Kit for cartridges supplied with an L control. With this kit, adjustments can be locked with a key to prevent unauthorized changes to the valve setting. Adjustments are easily accessible once the lock assembly is removed via the key. Installation of this key lock kit requires the replacement of the standard locknut with a special adapter locknut which accepts the lock assembly. A new wire stop ring is also provided for overset protection. This item is for series all catrtidges with an L series Don't know what series catridge you have? Look it up here.
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