Watts R119-03B Regulator 321894-706 the crankcase heater should be

the crankcase heater should be energized during the compressor's "off" cycle to ensure the oil is pre-heated and ready for the next start

reducing labor time during HVAC installation

High-Visibility Monitoring: Includes 5/8" OD x 12" length standard glass for clear inspection of liquid levels in boilers and storage tanks

While primarily designed for Armstrong Air products

Watts R119-03B Regulator 321894-706 the crankcase heater should beThe Watts R119 03B is a high capacity pneumatic pressure regulator designed for demanding industrial and HVAC applications requiring precise compressed air control. Built with a robust die cast aluminum body and a corrosion resistant finish, this unit manages a maximum inlet pressure of 300 PSI while providing a regulated output range of 0 to 60 PSI. The 3 8 inch NPT ports allow for high flow rates with minimal pressure drop, making it an essential