Efficient Combustion: Specifically designed for 90+ 2-stage furnaces to safely purge the heat exchanger and prevent carbon monoxide buildup

an ASME Section I or VIII valve would be required

The cut-out pressure is set by turning the range screw clockwise to increase the set point

Always verify the frame size of your drive before field installation

Always verify your valve body model before installation to ensure a proper fit

Weil McLain 570-350-370 Delay Timer THPU32HP7Y Efficient Combustion: Specifically designed forThe Weil McLain 570 350 370 Delay Timer is a critical OEM component designed for precise sequencing in hydronic heating systems, specifically engineered for LGB boiler models. Operating on a 24V control circuit, this timer provides a fixed 6 minute delay to prevent rapid short cycling, protecting the burner and ignition components from premature fatigue. In the field, managing post purge cycles or staged firing sequences is vital for maintaining high