Liquid Flow Switch, Ambient Temperature - Maximum 250 Degrees F, Ambient Temperature - Minimum 32 Degrees F, Connection Size 3/4 in, Connection Type NPT, Contact Rating (AC) 22.2 A @ 240V (Locked Rotor), 3.7 A @ 240V (Full Load), 44.4 A @ 120V (Locked Rotor), 7.4 A @ 120V (Full Load), Flow Rate - Maximum 1.5 gpm, Flow Rate - Minimum 1.5 gpm, For Pipe Size 3/4 in, Housing Material Brass, Media Temperature - Maximum 250 Degrees F, Media Temperature - Minimum 32 Degrees F, Overall Height 5.1 in