maintaining the exact pressure drop characteristics required for high-efficiency operation

including flame sensing and high-limit switch oversight

verify that the pilot valve capillary tubes are not kinked or restricted

Is this heat exchanger compatible with high-efficiency 90%+ AFUE furnaces

The TB Woods 4J-1/2 Coupler Flange is a size 4

Heil Quaker ICP 1175853 Valve 321894-708 maintaining the exact pressure dropThe Heil Quaker ICP 1175853 Valve is an OEM 2 stage gas valve designed for high efficiency heating systems. Operating on a 24V control circuit, this component features a 3 4" inlet and 1 2" outlet configuration, engineered to manage gas flow with precision across low and high fire stages. It is factory set for 3. 2" WC but is adjustable to meet specific manifold pressure requirements for Natural Gas or Liquid Propane (LP) with a proper conversion kit.