“Brand New in Box” Culligan 01033456 / 01033078 Auxiliary Input Output Circuit Board HE High Efficiency Water Softener Rev A. This DC Auxiliary board can only be used with a 28V DC Power Supply. "It is essential that your system utilizes a 28V DC power adapter" These are commonly used on late model HE Culligan models. See images of actual board you will receive in this listing.
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