FLOW SWITVH SERIES MODEL Connection(inch) Power(w) Start Flow(L/min) FS-A 1"-3/4" ≤260 ≥2 1"-1/2" ≤260 ≥2 3/4"-3/4" ≤120 ≥2 3/4"-1/2" ≤120 ≥2 FS-B 2"-2" 300-1500 3 1 1/2" -1 1/2" 300-1500 3 1"-1" 300-1500