The Sensus 143-16-021-04 Blue Spring is a critical calibration component engineered specifically for Sensus 243-12 and 121-12 gas pressure regulators

the signal should scale linearly from 0V at 0 PSI to 10V at 500 PSI when compared against a calibrated mechanical gauge

Heavy-duty 1/4" x 5/16" swivel joint construction prevents mechanical slop and linkage binding

This comprehensive Asco valve repair kit includes a high-grade Buna-N (NBR) diaphragm

is a high-performance 3/4 inch water pressure reducing valve designed for commercial and residential hydronic heating systems

York S1-7956-336P Gas Valve Refrigerant The Sensus 143-16-021-04 Blue SpringThe York S1 7956 336P Gas Valve is an essential component for maintaining combustion stability in residential and light commercial heating systems. As a direct OEM replacement for 7631A3261, this valve is engineered to restore factory spec performance in Coleman and York furnaces. This 24V intermittent pilot valve features a compact design with standard 1 2" NPT inlet and outlet ports, ensuring a clean fit within narrow furnace cabinets. It is rated