The Harwil Reed Flow Switch assembly is a high-quality replacement kit that includes the Harwil flow switch and a clear plastic housing. This housing features two 3/4-inch straight-through barb connectors and an additional smaller barb located at the bottom. Because the product code Q-12DS-C2 appears on several different models with varying technical parameters, it is essential to verify this model is a compatible replacement for yours before purchasing.
This assembly is a standard component in select Sundance 780 Series spas manufactured from 2008 onwards, as well as many Jacuzzi models and other major spa brands. The unit connects directly to the hot tub printed circuit board using a small white plug, often identified by part code 2560-040.
For a successful installation, pay close attention to the flow direction arrow located on the side of the switch to ensure the unit is positioned correctly within the plumbing. To prevent leaks and ensure accurate readings, the thread must be completely wound into the housing. Always cross-reference your existing connector type and probe length against this model to guarantee compatibility with your spa’s configuration.
- 2008 / 680 Burlington model equipped with circ pump
- 2007+ / Hartford & Hawthorne equipped with circ pump
- 2007 / Hamilton, Chelsee, Certa & Camden
- 2005-06 / Palermo, Bahia and Cayman models
- 2003-04 / Sweetwater models
