Balboa VS Series Pump 2 Single Speed Expander Board 53544
The Balboa circuit board (part#: 53544), fits the Balboa VS510SZ Controller and EL2001 M3 Systems by Balboa and is an add-on board to run a second single-speed spa circulation pump. Also known as the mini pump 2 board, this balboa expander board measures 3-1/8" x 1-5/8" and functions as a single relay pump 2 extension circuit board. Located on top of the heater on M3 systems, or Balboa VS systems with two pumps, this Balboa Mini Expander board comes with two wire connectors.
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