Over time the chain keeping deck fill caps from falling in the water can corrode and fail. When they fail, there is a 50/50 chance the cap will be lost. For these occasions, itâ€™s good to have a spare. Perko provides these black polymer replacement caps to keep boaters prepared and save them the hassle of replacing the entire deck fill fitting. These caps offer the same features as the original cap and include a new chain, and O ring to restore function. Keep one handy, because it is difficult to predict when the retainer chain will fail.
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