Description
Harwil Q-12DS-C2/SUND860 flow switch designed for Sundance spa systems from 1999 to present. Features a transparent tee with 3/4″ barb connections and 3/8″ side barb for reliable water circulation monitoring. Compatible with 2-pump and 3-pump configurations, plus 2001+ 1-pump Capri systems. Fits Sundance 800/850/880 series, Sweetwater, Portofino, and J-300 LCD models (2002+). If your spa displays a flashing or solid “Flo” error code, this replacement switch may resolve circulation issues caused by defective flow detection. Ensure proper filter maintenance and pump function for optimal performance.
