Always locate your pressure tap points on the top side of the refrigerant lines to prevent oil and sediment from accumulating in the bellows

The Allanson 421-557 is a heavy-duty oil burner ignition transformer engineered specifically for Arco and American Standard burners

Also identified under part number 81660146

This model features a 1-1/8 inch ODF solder connection and a 9/16 inch port diameter

Heil Quaker ICP 1177834 Gas Valve THPU32HP7Y Always locate your pressure tapThe Heil Quaker ICP 1177834 Gas Valve is an essential OEM replacement component engineered for precision fuel regulation in residential and light commercial HVAC systems. This 24V gas valve is factory calibrated for natural gas applications with a set point of 2. 9 inches WC (Water Column), ensuring consistent burner performance and optimal combustion efficiency. Built with a 3 4 inch NPT inlet and outlet, it integrates seamlessly into standard gas