High torque shaded-pole motor delivers many times more power than clock-type motors. Motor and gear train are completely im- mersed in lubricating fluid inside a metal casing for silent opera- tion. Automatic recycling with accessible notch wheel that shows valve position at all times. A single 40 va transformer will handle four 2-wire or six 3-wire valves. Built-in low voltage auxiliary contacts. Maximum water pressure 50 psi, maximum water tem- perature 240° F. 1361 models (2-wire) are for use with 24v 2-wire thermostat. Substitute F19-0097 motor assembly to convert to 3-wire operation. 1311 models are for 3 wire operation.