Flow Switch, Harwil, 1/2" MPT, Factory Set For LA Spas
Since the mid 1980's the Harwil Q-12 flow switch has been used by some of the largest companies in the Pool & Spa and fluid control industries. The Q-12 has several factory adjustable parameters that provide the flexibility to meet the requirements of almost any application. In a spa or hot tub, the Q-12 ensures sufficient flow to help protect the heater from damage.
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