55137 Balboa® 2-Relay Extension Circuit Board for VS520 Systems


SKU: 55137
MPN: 55137
UPC: 608819223599
Manufacturer: Balboa Water Group®
Warranty: by manufacturer 1 Year
Balboa ® 2-relay expander circuit board for 2nd pump used on VS520 Systems. This expander board is usually found on the following Balboa® Control System models: VS520Z, 525Z, 520SZ, 520DZ, and 523DZ. Includes 30 Amp fuse.


  • 2-relay design
  • Sensor and two built-in connectors
  • Includes 30 Amp fuse.

Productions Specifications:

  • Size: 3.125″ x 1.625″
  • Sensor and 2 connectors

This Circuit Board is a replacement for many 2-relay circuit boards by Balboa® and serves as a direct upgrade for many models.

This circuit board is also a replacement option for the following part numbers: 33-55137-K, 59-355-1600, 59-355-1051, 33-0029C-K, 3-60-0087, 3-00-5012, X-P332. Also replaces part number 56710 (used in LPI501 Systems).

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