The Heatco 36H54-404 3/4-Inch Two-Stage Gas Valve with Regulator is a high-performance control component designed for use in furnaces, boilers, and other gas-fired HVAC systems. It efficiently manages gas flow in two stages, providing precise modulation for improved combustion and energy efficiency. https://www.partshnc.com/36h54-404-heatco-34-2stg-gas-valve-wreg