Heater Catalog - Watlow

Immersion HeatersWATROD and FIREBAR Screw PlugImmersion HeatersOptional Moisture Resistant HousingsSingle-Pole ThermostatDouble-Pole Thermostat1 and 1 1 /4 inch NPT–1 WATROD Element 1 1 /4 inch NPT–2 WATROD Elements1 1 /4 inch NPT–1 FIREBAR ElementAll 2 and 2 1 /2 inch NPT screw plugs(1) 1.093 in.(28 mm) Dia. Hole17⁄16 in.(37 mm)27⁄8 in.(73 mm) Ref.69⁄16 in.(166.7 mm)4¼ in.(108 mm)4¼ in.(114 mm)25⁄8 in.(66.7 mm)15⁄16 in.(33.3 mm)Note: The thermostat is not centered on the WATROD screw plugimmersion heater.69⁄16 in.(166.7 mm)6 in.(152 mm)Single-Pole ThermostatAll 2 and 2 1 /2 inch NPTNote: The thermostat is not centered on the screw plugimmersion heater.69⁄16 in.(166.7 mm)4¼ in.(108 mm)Without Thermostat¾ in.ConduitOpening69⁄16 in.(166.7 mm)6 in.(152 mm)4 in.(100 mm)2 in.(51 mm)2 in.(50 mm)13⁄16 in.(20.6 mm)To order: Reference “W” in the Ordering Informationsection on page 234.WATLOW ®171