Installing a backflow preventer creates a closed system

Durability: Constructed from high-quality brass to withstand consistent thermal cycling without deformation

Using a switch with a different WC rating can lead to unsafe combustion conditions or frequent nuisance trips

For contractors performing retrofits or new installations where shaft accessibility is limited

If the switch is open at room temperature

Amana-Goodman OT18-60A Thermostat Els PW 17895 Installing a backflow preventer createsThe Amana Goodman OT18 60A is a critical outdoor thermostat for heat pump applications, functioning as the direct OEM replacement for legacy part numbers B13708 67, B1370867, and B1370867S. This field installed accessory utilizes a Single Pole Double Throw (SPDT) switch to provide precise control over auxiliary heat lockouts or compressor staging based on ambient temperatures. With an adjustable temperature range of 0F to 45F, it prevents inefficient