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Use With 1.5" Or 2" Tee Pilot Duty HRQ12D
Flow Switch, Harwil, 1/2" MPT, 3 GPM (On) 1 Amp, For 3/4" Plumbing Q12DS-3-3-4S-1
Flow Switch, Harwil, Beachcomber, 1/2" MPT, Pilot Duty, 1-7/8" Stem/Paddle, 4' Cable w/ 2 Pin JST Plug, (Factory Set For Beachcomber) Q-12DS-C2/BEACH
Flow Switch, Harwil, 1/2" Mpt, .5 Amp, 4'- 3 Wire Cable Q12DSC2/MAY2771
Flow Switch, Harwil, W/ 3.5 Ft 18/3 Cable, Factory Set Q-12DS50
Flow Switch,HARWIL,1" MPT,1Amp,Fac Set For D-1 Spas, 15W,120/240V,12VDC,D-1 P/N 01710-14 Q10N10691ALBN17