Press the button to reset after the system has cooled

protecting against carbon monoxide rollout

or incorrect gas pressure causing the unit to over-fire

Common Questions Can I use a 440V capacitor to replace this 370V 43-25133-34 model

This unit is built for durability

Sensus 143-16-021-07 Black Spring Press the button to resetThe Sensus 143 16 021 07 Black Spring is a critical component engineered for precise gas pressure regulation within industrial and commercial service environments. Specifically designed for field technicians, this replacement regulator spring is compatible with Sensus 243, 121, and 122 diaphragm type gas regulators. It provides a specific spring range essential for maintaining outlet pressure control. For Sensus 243 12, 121 12, and 122 12 gas